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How many weeks is fetal development?
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How a baby develops week to week?
- 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.
- First Trimester
- Second Trimester
- Third Trimester
The first trimester will span from conception to 12 weeks. This is generally the first three months of pregnancy. During this trimester, the fertilized egg will change from a small grouping of cells to a fetus that begins to have human features. The first trimester is exciting, but also when most people develop unpleasant symptoms like morning sick...
The second trimester of pregnancy is often thought of as the best part of the experience. By this time, any morning sickness is probably gone and the discomfort of early pregnancy has faded. You may also start to feel movement as the fetus flips and turns in your uterus. During this trimester, many people find out about the fetus’s assigned sex. Th...
This is the final part of your pregnancy. You may be tempted to start counting down the days to your due dateand hope that it comes early, but each week of this final stage of development helps the fetus prepare for birth. Throughout the third trimester, the fetus gains weight quickly, adding body fat that’ll help after birth. Your healthcare provi...
- The first 8 weeks. The first 2 months are when your body gets ready for the changes that pregnancy brings. It’s also the time when your baby’s brain, heart, bones, blood vessels and organs develop.
- First 4 weeks. By the end of the first week: if you conceived naturally, the fertilised egg (also called a blastocyst) has made its way along your fallopian tube and attached itself to the lining of your womb.
- Week 5 to 8. Your baby’s spine starts to grow very early in your pregnancy – often before you know you’re pregnant. Folic acid. Folic acid (folate) helps: your baby’s spine to develop.
- Week 5 to 8. By week 5 to 8 you may start feeling: very emotional as pregnancy hormones start to kick in – this is common and it’s normal to feel low one minute and happy and excited the next.
At the end of the tenth week of pregnancy (8 weeks after fertilization), the fetal stage begins. During this stage, the organs and systems that have already formed grow and develop as follows: By 12 weeks of pregnancy: The fetus fills the entire uterine cavity.
- a missed period (often one of the first signs of pregnancy)
- a metallic taste in your mouth.
- sore breasts.
- nausea – also known as morning sickness, although you can experience it at any time (read about morning sickness in week 6)
Jun 3, 2022 · By the end of the 10th week of pregnancy — eight weeks after conception — your baby's toes and fingers lose their webbing and become longer. By the 10th week of pregnancy, or eight weeks after conception, your baby's head has become more round.
Jan 5, 2016 · Fetal development. Three weeks after the first day of your last period, your fertilised egg (ovum) moves slowly towards the uterus. From that moment on and for the following 35 weeks, the embryo develops and becomes a foetus. The baby will continue to grow inside the uterine cavity up until the delivery date.
