Can a Baby Get Pregnant Inside the Womb
Having a baby: Stages of pregnancy by trimester
For a pregnant person, feeling a new life developing inside your body is an astonishing experience, even though yous may non ever feel your best during all the stages of pregnancy. One of the biggest changes for near pregnant people is weight gain — a meaning person carrying one babe should gain betwixt 11 and forty lbs. (v to 18 kilograms) by the end of the pregnancy, depending on pre-pregnancy weight, according to the Centers for Disease Control and Prevention.
But there are many other changes too, and exactly how pregnancy affects the trunk tin can be very dissimilar from person to person, and fifty-fifty for the same mother from 1 pregnancy to the next. Some symptoms of pregnancy last for several weeks or months, while other discomforts are temporary or don't bear upon everyone the aforementioned way.
"Pregnancy is a long, 10-calendar month journey," said Dr. Draion Burch, an obstetrician and gynecologist at Magee Womens Hospital at the University of Pittsburgh Medical Center.
A normal pregnancy usually lasts about 40 weeks, counting from the beginning day of the concluding menstrual menstruation, which is effectually ii weeks before conception actually occurs. Pregnancy is divided into three trimesters, each lasting between 12 and 13 weeks. During each trimester, changes take place in a meaning person's torso also as in the developing fetus.
Some medical experts suggest that mothers and doctors should also recognize a "fourth trimester," which is the 12-week period after nascence in which babies are adjusting to life outside the womb and women are coping with maternity and on-going changes in their bodies, according to a paper published in July 2017 in the American Periodical of Obstetrics and Gynecology.
Conception & implantation
Almost two weeks later on a flow, ovulation occurs, during which the ovaries release typically one egg, merely sometimes two or more eggs. The egg or eggs tin can be fertilized by a sperm cell 12 to 24 hours after release, as the egg travels down the fallopian tube toward the uterus.
The sex of the fetus is determined at the time of fertilization, or conception, and depends on whether the egg receives an X or Y chromosome from a sperm cell. If the egg receives an X chromosome, the baby will be a girl; a Y chromosome means the baby will exist a male child.
According to the Cleveland Dispensary, it takes about three to 4 days for the fertilized egg (or embryo) to move to the lining of the uterus, where it attaches or implants to the uterine wall. In one case the embryo is implanted, the cells start to grow, eventually becoming the fetus and the placenta, which is tissue that attaches to the lining of the uterus. The placenta transports oxygen, nutrients and hormones from the female parent's blood to the developing fetus via the umbilical cord throughout pregnancy.
First trimester, weeks 1-12
Commencement trimester changes in the mother:
Significant people will experience a lot of symptoms during the beginning trimester as the body adjusts to the hormonal changes of pregnancy. In the early weeks, the pregnancy may not exist showing much on the outside of her body, but inside many changes are taking place.
Related: Am I pregnant? 12 early signs of pregnancy
One of the first changes is the production of human chorionic gonadotropin (hCG) hormone, which shows up in the blood right after conception occurs. Levels of hCG can be detected in a pregnant person's urine about a calendar week after a missed period. Human being chorionic gonadotropin is what'south detected in a positive home pregnancy exam.
Rising levels of hCG and other hormones, such equally estrogen, may be responsible for the waves of nausea and airsickness known as morning sickness that'due south nigh common during the first few months of pregnancy. Despite its name, forenoon sickness tin can occur whatsoever fourth dimension of twenty-four hour period.
A pregnant person may too experience more tired than usual during the first trimester, a symptom that's linked with ascent levels of the hormone progesterone, which increases sleepiness.
Early on in pregnancy, breasts may feel more than tender and bloated, another side outcome of rising levels of pregnancy hormones. The areolas, the pare around each nipple, volition darken and enlarge.
A meaning person'southward digestive system may boring downwards to increase the absorption of benign nutrients. Merely reduced mobility of the digestive system might also trigger such common complaints as heartburn, constipation, bloating and gas, co-ordinate to the Office on Women's Health (OWH).
Many parts of the torso volition piece of work harder during pregnancy, including the heart. Heart rate volition increase to pump more than blood to the uterus, which will supply it to the fetus.
Also the physical changes, expecting mothers may also feel emotional highs and lows in the early on months of her pregnancy and throughout it. These emotions may range from weepiness, mood swings and forgetfulness, to fearfulness, feet and excitement.
Related: Mood swings & mommy encephalon: The emotional challenges of pregnancy
Start trimester embryo evolution:
A developing baby is called an embryo from the moment formulation takes place until the 8th calendar week of pregnancy.
During the first month of pregnancy the centre and lungs begin to develop, and the artillery, legs, encephalon, spinal cord and nerves begin to form, co-ordinate to the American College of Obstetricians and Gynecologists (ACOG).
The embryo volition be about the size of a pea around one month into a pregnancy, Burch said. Around the second month of pregnancy, the embryo has grown to the size of a kidney bean. In improver, the ankles, wrists, fingers and eyelids form, basic appear, and the genitals and inner ear begin to develop.
Later on the 8th week of pregnancy and until birth occurs, a developing infant is called a fetus.
By the end of the second calendar month, most of the fetus' main organs will have formed, Burch said. At this stage of pregnancy, he stressed, it's extremely important that pregnant women do non take harmful medications, such equally illegal drugs. The first trimester is as well the period when well-nigh miscarriages and nativity defects occur. Between 10% and 20% of known pregnancies end in miscarriages, mostly because the fetus is not developing usually, co-ordinate to the Mayo Clinic. Studies have plant the risk of miscarriage drops significantly after the 12th week of pregnancy.
As early every bit the 10th calendar week of pregnancy, a pregnant person may opt to have a noninvasive prenatal examination (NIPT). This testing uses a blood sample from the female parent to clarify DNA from the fetus to aid determine the risk of the baby beingness born with certain genetic abnormalities, according to MedlinePlus. The mother tin can also find out the sex activity of the baby at this fourth dimension, also through providing a blood sample that analyzes fetal DNA. None of these tests come up in contact with or cause any impairment to the fetus.
During the 3rd calendar month of pregnancy, the fetus' bones and muscles brainstorm to grow, buds for future teeth appear, and fingers and toes grow. The intestines begin to form and the skin is almost transparent.
Second trimester, weeks 13-27
2nd trimester changes in the mother:
By the second trimester, some of the unpleasant effects of early on pregnancy may lessen or disappear every bit the body adjusts to its changing hormone levels. Sleeping may become easier and free energy levels may increase.
Nausea and vomiting ordinarily get better and go abroad, Burch told Live Science. But other symptoms may crop up as the fetus continues its growth and evolution.
Meaning people will start to experience more pelvic pressure, Burch said, adding that the pelvis feels heavy like something is weighing information technology downward.
A more visible baby crash-land appears every bit the uterus grows beyond the pelvis, and the pare over the expanding belly may itch as it stretches, according to the OWH.
As the fetus is getting bigger and the mother is gaining more pregnancy weight in the front of her trunk, she may too experience more back pain, Burch said. A 2020 report published in the Journal of Personalized Medicine institute that while most meaning people experienced back pain, information technology was worse in those who were non physically active.
Old between the 16th and 18th weeks of pregnancy, a first-time mother may experience the commencement fluttering movements of the fetus, known as quickening, Burch said. Information technology it isn't the commencement pregnancy, the mother is likely to feel the fetus kicking, squirming or turning even sooner because she knows what to expect, he said.
The 20th week normally marks the halfway point of pregnancy. From nigh xx weeks, it is possible to develop preeclampsia, a condition characterized by high-blood pressure, according to the Mayo Clinic. If left untreated, the status tin can lead to serious, even fatal, complications for mother and babe. Other symptoms include rapid weight proceeds and swelling.
Burch encourages his patients to have a "baby-moon" — a mini-vacation or weekend getaway — during the second trimester, and he said the best fourth dimension to get away is effectually the 28th calendar week of pregnancy. Expecting mothers are by and large feeling pretty practiced at this betoken, and there'due south a lower hazard of miscarriage and premature labor. A study published in 2020 in the journal PLOS 1, constitute that for hundreds of thousands of babies, their mother's aeroplane travel had no adverse effects on the baby's nascency weight or gestational historic period. However, some health professionals and airlines may discourage aeroplane travel after the 36th week because at that time birth could exist just around the corner.
Second trimester fetal evolution:
In the second trimester, the fetus will be between 3 and five inches (seven and 12 centimeters) long, Burch said. Onetime between 18 and 22 weeks, an ultrasound may reveal the sex of the baby, if parents desire to know this information in accelerate.
Related: Am I having a boy or daughter? Ultrasound and sexual practice prediction
By the fourth calendar month of pregnancy the fetus' eyebrows, eyelashes, fingernails and the neck form, and the peel has a wrinkled advent. In improver, during the fourth month the arms and legs can bend, the kidneys start working and can produce urine, and the fetus tin consume and hear, co-ordinate to the ACOG.
In the fifth month of pregnancy, the fetus is more than agile and the mother may be able to feel its movements. The fetus also sleeps and wakes on regular cycles. A fine pilus (chosen lanugo) and a waxy coating (called vernix) comprehend and protect the thin fetal skin.
By the sixth month of pregnancy, pilus begins to grow, the eyes begin to open up and the brain is rapidly developing. Although the lungs are completely formed, they don't yet role.
Third trimester, weeks 28-40
3rd trimester changes in the female parent:
During the 3rd trimester, as the mother'due south enlarged uterus pushes against her diaphragm, a major musculus involved in breathing. Because of this, she may experience short of breath because the lungs take less room to expand, according to Johns Hopkins Medicine. A pregnant person's ankles, hands, anxiety and face may cracking due to fluid retention and slower blood apportionment.
A female parent-to-be will need to urinate more than oftentimes because of the pressure on her float. She may besides take more backaches and more pain in the hips and pelvis, equally these joints aggrandize in preparation for commitment. Changes in torso shape tin also make a pregnant person more than unstable on their feet and more than likely to fall, according to a 2006 study published in the American Journal of Obstetrics and Gynecology.
Her confront may develop dark patches of skin, and stretch marks may appear on her abdomen, thighs, breasts and backside. She may also notice varicose veins on her legs.
In the third trimester, the breasts may showtime to leak colostrum, a yellow liquid, as they get set up for breastfeeding, according to the OWH. The baby volition start to drop lower in the mother's abdomen.
Imitation labor, known equally Braxton-Hicks contractions, may brainstorm to occur equally the due engagement gets closer. A "nesting instinct," behavior exhibited in many mammals, may kicking in equally expecting parents work on baby-proofing their dwelling house, shop for infant items, gear up the nursery and await their new arrival.
Related: Signs of labor: 6 clues baby is coming shortly
During the final weeks of pregnancy, it will become harder to discover a comfortable sleeping position, adding to the increased levels of fatigue, Burch said.
Third trimester fetal development:
By the seventh month of pregnancy, the fetus kicks and stretches, and can fifty-fifty respond to low-cal and sound, Burch said. Its eyes can also open and shut.
During the eighth and ninth months of pregnancy, the fetus gains weight very quickly. Bones harden, but the skull remains soft and flexible and so the caput can fit through the nascency canal. Unlike regions of the encephalon are forming, and the fetus is able to hiccup, according to ACOG.
The ninth month is the habitation stretch of pregnancy, and the fetus is getting ready for birth past turning into a head-down position in the female parent'south pelvis. The lungs are now fully mature and fix to role on their own.
The definition of a full-term pregnancy is when a baby is built-in afterward 39 to twoscore weeks (information technology used to be 37 weeks), Burch said. This is considering babies born at total-term had lower risks of issues with animate, feeding and regulating their temperature than those born earlier, according to the National Institutes of Health.
Fourth trimester, mail-nativity
The catamenia called the "fourth trimester" begins every bit soon equally birth is over. While this tin be a joyful and exciting time for about new parents, it can also be extremely challenging and stressful.
In the weeks and months after the babe is born, the mother's trunk continues to go through major changes as it heals and recovers from pregnancy and birth. At the aforementioned time, the female parent must grapple with the physical and emotional challenges of feeding and caring for a newborn, Dr. Ilona T. Goldfarb, a maternal health specialist, wrote for the Harvard Health Blog. "Women and their families feel substantial physiological, social and emotional changes," during this fourth dimension, Goldfarb wrote.
Despite the continuing changes and challenges that occur subsequently childbirth, most mothers visit their obstetrician just once in the weeks after nascence. Many health experts agree that this lack of attention to maternal health in the 4th trimester is apropos, especially considering that more than half of pregnancy-related deaths occur afterwards the nativity of the child, co-ordinate to a 2018 report from the ACOG.
Fortunately, several of these experts are putting pressure on the healthcare community to provide more comprehensive postpartum care. Goldfarb recommends pregnant people come up up with a postpartum plan to help anticipate difficulties and how to deal with them as they pop up. She also recommends mothers speak with their obstetrician to learn more nigh the kind of postpartum resources they have.
Additional resources
- Mayo Dispensary: Pregnancy Week by Week
- Office on Women's Health: Stages of Pregnancy
- American Higher of Obstetricians and Gynecologists: Postpartum Depression FAQs
This article is for advisory purposes simply, and is not meant to offer medical advice. This commodity was updated on June 14, 2021 by Live Science contributor Sarah Wild.
Can a Baby Get Pregnant Inside the Womb
Source: https://www.livescience.com/44899-stages-of-pregnancy.html
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