What fetal development occurs in the 2nd trimester?

What happens during second trimester of pregnancy?

During the second trimester of pregnancy, you might experience physical changes, including: Growing belly and breasts. As your uterus expands to make room for the baby, your belly grows. Your breasts will also gradually continue to increase in size.

What are 2 major developments during each trimester of fetal development?

In the first trimester, your baby will grow from a fertilized egg into a moving fetus with eyes, ears, and working organs. In the second trimester, your baby’s features develop and you may be able to feel your baby move. In the third trimester, your baby will grow rapidly to get ready for birth.

What is the second stage of fetal development?

This union marks the beginning of the prenatal period, which in humans encompasses three distinct stages: (1) the pre-embryonic stage, the first two weeks of development, which is a period of cell division and initial differentiation (cell maturation), (2) the embryonic period, or period of organogenesis, which lasts …

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What are the major organs to develop in the 2nd trimester?

During the final weeks of your second trimester, fat starts to develop on your baby’s skin, and its major organs — such as the liver and pancreas — become stronger. At the end of 24 weeks, the fetus is about 10 to 11 inches long and weighs about 1 pound.

How do I know if my baby is developing normally in the womb?

An ultrasound is usually done for all pregnant women at 20 weeks. During this ultrasound, the doctor will make sure that the placenta is healthy and attached normally and that your baby is growing properly. You can see the baby’s heartbeat and movement of its body, arms, and legs on the ultrasound.

Which trimester is most important for development?

The First Trimester: Fetal Development. The most dramatic changes and development happen during the first trimester. During the first eight weeks, a fetus is called an embryo.

What weeks does the baby grow the most?

Week 31: Baby’s rapid weight gain begins

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 gain weight — quickly.

In which trimester does the baby grow the most?

The second trimester is a time of rapid growth for your baby (called a fetus). Most of the brain’s development begins now and will continue after your baby’s birth.

Which trimester is the most critical?

The first trimester is the most crucial to your baby’s development. During this period, your baby’s body structure and organ systems develop.

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What is the last organ to be developed in a fetus?

Almost all organs are completely formed by about 10 weeks after fertilization (which equals 12 weeks of pregnancy). The exceptions are the brain and spinal cord, which continue to form and develop throughout pregnancy. Most malformations (birth defects) occur during the period when organs are forming.

What part of the body grows first in the womb?

The heart is the first organ to form during development of the body. When an embryo is made up of only a very few cells, each cell can get the nutrients it needs directly from its surroundings.