What is the name of a sperm cell that unites with a secondary oocyte?

What is the union of a sperm cell and an egg?

Gestation period lasts from last menstrual period until when?

What does the "C" C-section stand for?

What 2 functions does the Aminion have?

This period begins with fertilization and ends with birth.

What is the surrounding of the oocyte cell membrane called?

The L-selectin adhesion surface molecules aid in the formation of what?

Nerve impulses initiated to the hypothalamus signal this hormone to be released to stimulate contractions.

What is the process when the primary germ layers of the embryo begin to form organs?

The period beginning at birth, ending at death.

What is another name for fertilization?

What is the ball of 16 or more cells called?

Rhythmic muscular contractions begin moving from the top to the bottom of the uterus.

What is the aggregation of permanent melanin in the skin?

Normal pregnancy lasts for how many weeks?

The two enzymes released from the acrosome of a sperm are...

This describes how receptive the endometrium is to implantation.

It bypasses the liver to conduct nearly half of the umbilical vein blood directly to the inferior vena cava.

What are environmental factors that cause congenital malformations by interfering with prenatal growth or development?

The continuos process of an individual changing from one life phase to another is called what?

The nuclei from two sex cells is called what?

A fertilized egg, commonly called a zygote, is also known as a...

This occurs in 70% of twin births.

Aggregated mesodermal cells that form a rod is called what?