Anatomy & Physiology

Embryonic Development Embryonic Development inner cell mass of the blastocyst begins to differentiate into three primary germ layers: ectoderm, endoderm, and...
Fertilization & Implantation Fertilization & Implantation the genetic material from a sperm cell (spermatozoon) and secondary oocyte merge into a single...
Menstruation Menstruation At the time the ovaries are formed in the fetus, there are approximately 6000000 primordial follicles, which decrease to about 600000 at birth, to 300000 at the first menstrual cycle, to about 10000 at the time of menopause...
Female Reproductive Anatomy Female Reproductive Anatomy Ovary: produce female eggs/ovum and female hormones (estrogen, progesterone...
Human Chorionic Gonadotropin hCG Human Chorionic Gonadotropin hCG The hormone, human chorionic gonadotropin (better known as hCG), is produced during pregnancy. It is made by cells that form the placenta, which nourishes the egg after it has been fertilized and becomes attached to the uterine wall. hCG can...
The Development of the Baby Week by Week The Development of the Baby Week by Week The First TrimesterZygote DevelopmentOvualtion to 12 - 24 hours - single sperm penetrates the egg and a joining of gentic information occurs. A single cell is formed, call a zygote...
Maternal Changes Maternal Changes Week 1 -period beginsWeek 2 -uterus has shed its lining through your period-a new bed of blood-rich tissue is delevoping-eggs are ripening in one of the...
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