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Mar 19, 2024 · Fetal development is an orderly and intricate process. It begins before you even know you’re pregnant and ends with the birth of your baby. Between conception and delivery, there are many detailed steps that have to occur. There are three stages of fetal development: germinal, embryonic and fetal.
Jun 3, 2022 · Thirteen weeks into your pregnancy, or 11 weeks after conception, your baby is beginning to make urine and release it into the surrounding amniotic fluid. Your baby also swallows some amniotic fluid. Bones are beginning to harden in your baby's skeleton, especially in the skull and long bones.
- Fourteen weeks into your pregnancy, or 12 weeks after conception, your baby's neck has become more defined and the lower limbs are well-developed....
- Fifteen weeks into your pregnancy, or 13 weeks after conception, your baby is growing rapidly. Bone development continues and will become visible o...
- Sixteen weeks into your pregnancy, or 14 weeks after conception, your baby's head is erect. His or her eyes can slowly move. The ears are close to...
- Seventeen weeks into your pregnancy, or 15 weeks after conception, toenails appear.Your baby is becoming more active in the amniotic sac, rolling a...
- Eighteen weeks into your pregnancy, or 16 weeks after conception, your baby's ears begin to stand out on the sides of his or her head. Your baby mi...
- Nineteen weeks into your pregnancy, or 17 weeks after conception, growth slows.A greasy, cheeselike coating called vernix caseosa begins to cover y...
- Halfway into your pregnancy, or 18 weeks after conception, you might be able to feel your baby's movements (quickening). Your baby is regularly sle...
- Twenty-one weeks into your pregnancy, or 19 weeks after conception, your baby is completely covered with a fine, downy hair called lanugo. The lanu...
- Twenty-two weeks into your pregnancy, or 20 weeks after conception, your baby's eyebrows and hair are visible. Brown fat also is forming, the site...
- Twenty-three weeks into your pregnancy, or 21 weeks after conception, your baby begins to have rapid eye movements. Ridges also form in the palms o...
- What does your baby look like now? Follow your baby's development week by week, from conception to labor, in these amazingly detailed, doctor-reviewed images.
- 2 weeks: Fertilization. At the start of this week, you ovulate. Your egg is fertilized 12 to 24 hours later if a sperm penetrates it – and this simple biological occurrence begins a series of increasingly complicated processes that leads to a new human life, if all goes well.
- 3 weeks: Implantation. Now nestled in the nutrient-rich lining of your uterus is a microscopic ball of hundreds of rapidly multiplying cells that will develop into your baby.
- 4 weeks. Your ball of cells is now officially an embryo. You're now about 4 weeks from the beginning of your last period. It's around this time – when your next period would normally be due – that you might be able to get a positive result on a home pregnancy test.
Jun 3, 2022 · Thirty-nine weeks into your pregnancy, or 37 weeks after conception, your baby's chest is becoming more prominent. For boys, the testes continue to descend into the scrotum. Fat is being added all over your baby's body to keep him or her warm after birth.
- Twenty-eight weeks into your pregnancy, or 26 weeks after conception, your baby's eyelids can partially open and eyelashes have formed. The central...
- Twenty-nine weeks into your pregnancy, or 27 weeks after conception, your baby can kick, stretch and make grasping movements.
- Thirty weeks into your pregnancy, or 28 weeks after conception, your baby's eyes can open wide. Your baby might have a good head of hair by this we...
- Thirty-one weeks into your pregnancy, or 29 weeks after conception, your baby has finished most of his or her major development. Now it's time to g...
- Thirty-two weeks into your pregnancy, or 30 weeks after conception, your baby's toenails are visible.The layer of soft, downy hair that has covered...
- Thirty-three weeks into your pregnancy, or 31 weeks after conception, your baby's pupils can change size in response to a stimulus caused by light....
- Thirty-four weeks into your pregnancy, or 32 weeks after conception, your baby's fingernails have reached his or her fingertips.By now your baby mi...
- Thirty-five weeks into your pregnancy, or 33 weeks after conception, your baby's skin is becoming pink and smooth. His or her limbs have a chubby a...
- Thirty-six weeks into your pregnancy, or 34 weeks after conception, the crowded conditions inside your uterus might make it harder for your baby to...
- Thirty-seven weeks into your pregnancy, or 35 weeks after conception, your baby has a firm grasp.To prepare for birth, your baby's head might start...
- Weeks 1 and 2: Getting ready. It might seem strange, but you're not actually pregnant the first week or two of the time allotted to your pregnancy. Yes, you read that correctly!
- Week 3: Fertilization. Fertilization and implantation. The sperm and egg unite in one of your fallopian tubes to form a one-celled entity called a zygote.
- Week 4: Implantation. The rapidly dividing ball of cells — now known as a blastocyst — has begun to burrow into the uterine lining (endometrium). This process is called implantation.
- Week 5: Hormone levels increase. Fetal development three weeks after conception. The fifth week of pregnancy, or the third week after conception, the levels of HCG hormone produced by the blastocyst quickly increase.
At ovulation, the mucus in the cervix becomes more fluid and more elastic, allowing sperm to enter the uterus rapidly. Within 5 minutes, sperm may move from the vagina, through the cervix into the uterus, and to the funnel-shaped end of a fallopian tube—the usual site of fertilization.
People also ask
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Read on to learn more about what you can expect to happen week-by-week during pregnancy, including how big your baby is each week, common early pregnancy symptoms you might experience and, once you’ve entered the third trimester, ways to prepare for labor and signs that labor is near.
