What are the stages of development from conception through pregnancy and birth?

The process of prenatal development occurs in three main stages. The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.

What are the 3 stages of development from conception to birth?

From beginning as a one-cell structure to your birth, your prenatal development occurred in an orderly and delicate sequence. There are three stages of prenatal development: germinal, embryonic, and fetal.

How the development of a fetus starts at conception?

Within 24 hours after fertilization, the egg that will become your baby rapidly divides into many cells. By the eighth week of pregnancy, the embryo develops into a fetus. There are about 40 weeks to a typical pregnancy. These weeks are divided into three trimesters.

What does a 1 week old fetus look like?

Your baby is right around 4 inches long from the top of the head to the rump and weighs about 4 1/2 ounces — roughly the size of a small peach. Like a peach, their body is covered with soft hairs. These are called lanugo, and they’re like a little coat providing warmth in the womb.

What are the 4 stages of human development in the womb?

Pre-embryonic and embryonic development The machinery is essential for four processes: cell proliferation, cell specialization, cell interaction, and cell movement.

What happens in conception step by step?

To become pregnant, the following steps must occur: Sperm transport — The sperm must be deposited and transported to the site of fertilization. Egg transport — Ovulation must occur and the egg must be “picked up” by the tube. Fertilization and embryo development — Union between the sperm and egg must result.

What is the timeline for conception?

Implantation timeline Day 1: the first day of a period. Day 14: ovulation. Day 15: fertilization — the egg can be fertilized for about 24 hours after ovulation. Day 20–24: implantation of the blastocyst in the uterus.