Embryology Handout Practice Map

1. Fertilization

1.1. Ampulla of uterine tube

1.2. Fusion of pronuclei

1.2.1. Division of blastomeres

1.2.1.1. Formation of Morula(Day 3)

1.2.1.1.1. Tight junctions allow fluid into morula

1.3. Pregnancy

1.3.1. Increased hCG secretion by syncytiotrophoblast

1.3.1.1. Maintains corpus luteum

1.3.1.1.1. Makes progesterone

1.3.2. Ectopic pregnancy

1.3.2.1. embryo implants in abnormal sights

1.3.2.1.1. ampullary region of uterine tube

1.3.2.1.2. Rectouterine pouch

2. No fertilization

2.1. corpus luteum regresses

2.1.1. No progesterone

2.1.1.1. Menstruation

2.1.1.1.1. Regenerates endometrial glands

2.2. Infertility

2.2.1. 15-30% of couples

2.2.1.1. use ART

2.2.1.1.1. 1% of US births

2.2.1.1.2. increased prematurity

2.2.1.1.3. low birth weight

2.2.1.1.4. birth defects