×

Hormonal regulation of pregnancy - weeks 17 through 38

8138

0

HWC

By: HWC

Date Uploaded: 10/01/2019

Tags: Fertilization   human body  

• Estrogens increase uterine blood flow, maintaining the endometrium during pregnancy. • High levels of estrogen and progesterone inhibit the synthesis of milk. Progesterone inhibits myometrial contractions of the uterus to prevent premature birth. • Relaxin inhibits myometrial contractions of the uterus. • Relaxin also increases the flexibility of the pubic symphysis to aid in birth. • Human chorionic somatomammotropin (hCS) enhances maternal breast growth by increasing protein synthesis. • hCS helps prepare mammary glands for lactation. • hCS increases maternal fatty acid use for ATP production, leaving more glucose available for the fetus. • inhibits glucose uptake by maternal cells, thereby leaving even more blood glucose available to the fetus. • Corticotropin-releasing hormone (CRH) stimulates the fetal anterior pituitary gland to secrete adrenocorticotropic hormone (ACTH). • ACTH stimulates fetal cortisol, which triggers fetal lung maturation and surfactant production. • Placental CRH levels increase greatly toward the end of the pregnancy and stimulate the fetus and the placenta to produce more estrogens. • Increased levels of estrogen act as a timer for birth and preparation for lactation.

Share

Embed

Copy and paste this code into your website or blog.

Add To

You must login to add videos to your playlists.

Comments

0 Comments total

to post comments.

No comments have been posted for this video yet.