This chemical is linked to the beginning of childbirth and is thought to signal the uterus to begin contractions

This chemical is linked to the beginning of childbirth and is thought to signal the uterus to begin contractions:

A. human chorionic gonadotropin.
B. estradiol.
C. corticotrophin-releasing hormone.
D. follicle stimulating hormone.

Correct answer is option C. Explanation: This chemical is linked to the beginning of childbirth and is thought to signal the uterus to begin contractions: corticotrophin-releasing hormone.