Question

Describe the major developments during each trimester of human gestation.

Short answer

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

Step-by-step solution

Step 1. Introduction

Gestation is the period of time between conception and birth. During this time, the baby grows and develops inside the mother's womb.

Step 2. Explanation

• The first trimester lays down the basic structures of the body, including the limb buds, heart, eyes, and the liver.
• The second trimester continues the development of all of the organs and systems established during the first trimester. The placenta takes over the production of estrogen and high levels of progesterone and handles the nutrient and waste requirements of the fetus.
• The third trimester exhibits the greatest growth of the fetus, culminating in labor and delivery.