Menstruation Days 1 Through 4 First Part of the Follicular Phase

■ In the absence of fertilization, progesterone withdrawal results in endometrial sloughing (menses).

■ Prostaglandins contained in those endometrial cells are released, often resulting in cramps from uterine contractions.

Endocrine cycle

Ovarian histology

Endometrial histology

37.0

36.0

Follicular recruitment Dominant follicle

Corpus luteum

Follicular recruitment Dominant follicle

Corpus luteum

I I I I I I I I I I I I I I I I I I I I I I I I I I I 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28

Days

I I I I I I I I I I I I I I I I I I I I I I I I I I I 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28

Days

FIGURE 15-1. The menstrual cycle.

(Reproduced, with permission, from Fauci AS, Braunwald E, Isselbacher KJ, et al. Harrison's Principles of Internal Medicine, 14th ed. New York:McGraw-Hill, 1998:2101.)

Get Pregnant - Cure Infertility Naturally

Get Pregnant - Cure Infertility Naturally

Far too many people struggle to fall pregnant and conceive a child naturally. This book looks at the reasons for infertility and how using a natural, holistic approach can greatly improve your chances of conceiving a child of your own without surgery and without drugs!

Get My Free Ebook


Post a comment