Prenatal Development

The first stage of prenatal development, lasting approximately 2 weeks, which includes fertilization, formation of the zygote, and implantation.

The second stage of prenatal development, occurring from implantation to the 8th week, during which the three germ layers (ectoderm, mesoderm, and endoderm) form and major organ systems develop.

The third and final stage of prenatal development, lasting from the 9th week until birth, characterized by rapid growth, organ maturation, and the development of sensory and behavioral capacities.

Fluid surrounding the developing fetus that regulates temperature and protects the baby from sudden movements.

The outermost membrane surrounding the amnion, which forms finger-like villi that attach to the uterus and helps in the formation of the placenta.

An organ that develops during pregnancy and acts as a bridge between the mother's and fetus's blood vessels, allowing the transfer of nutrients and waste.

One of the three germ layers formed during the embryonic period, responsible for the development of the nervous system and skin.

One of the three germ layers formed during the embryonic period, responsible for the development of the skeleton, muscles, and circulatory system.

One of the three germ layers formed during the embryonic period, responsible for the development of the digestive system, lungs, urinary tracts, and glands.

A white, cheeselike substance that forms on the fetus during the second trimester, preventing chapping of the skin in the amniotic fluid.

Fine, downy hair that appears on the fetus during the second trimester, helping the vernix stick to the skin.

Environmental agents that can cause damage during the prenatal period, leading to birth defects or developmental abnormalities.

A condition caused by maternal alcohol consumption during pregnancy, characterized by slow physical growth, facial abnormalities, and brain injury.

A teratogen that can lead to prematurity, physical abnormalities, and slow physical development in the fetus.