Progesterone in Pregnancy

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What hormone maintains the endometrial lining of the uterus and increases the uterine threshold to contractile stimuli?

Progesterone (correct)

HCG

Estrogen

Prostaglandins

Which hormone is produced by the trophoblast and stimulates corpus luteal production of progesterone and estrogen?

Prolactin

Estradiol

HCG (correct)

Estriol

What hormone assumes responsibility for the production of steroid hormones during the 2nd and 3rd trimesters of pregnancy?

Estriol

Placenta (correct)

Prolactin

Progesterone

What is the main hormone that increases the sensitivity of the uterus to contractile stimuli near term?

Cortisol Signup and view all the answers

Which hormone stimulates local production of prostaglandins in the uterus, increasing its contractility?

Estrogen Signup and view all the answers

What hormone is transformed from cholesterol in the placenta during pregnancy?

Estriol Signup and view all the answers

What is the primary role of oxytocin during parturition?

Facilitate uterine contractions Signup and view all the answers

What happens to hormone levels after delivery of the placenta?

They return to prepregnant levels, except for prolactin Signup and view all the answers

How does prolactin affect ovulation during lactation?

Inhibits GnRH secretion Signup and view all the answers

Why does lactation not occur during pregnancy?

Estrogen inhibits prolactin action on the breast Signup and view all the answers

What is the role of suckling in maintaining lactation?

Stimulates secretion of oxytocin and prolactin Signup and view all the answers

In a 56-year-old woman who completed menopause 3 years ago, but has low levels of FSH, what could be a likely explanation?

There is a pituitary gland issue affecting FSH production Signup and view all the answers

What is the primary source of estrogen in the non-pregnant female?

Corpus albicans ovarian follicles or corpus luteae Signup and view all the answers

When does menstruation begin in relation to the degeneration of the corpus luteum?

During the degeneration of the corpus luteum Signup and view all the answers

What triggers the end of menstruation?

Stromal cells of the ovaries Signup and view all the answers

Which cells are responsible for the synthesis and secretion of estrogen and progesterone in the ovaries?

Both granulosa and theca cells Signup and view all the answers

During which phase of the menstrual cycle do estrogen levels rise rapidly?

Follicular phase Signup and view all the answers

In a pregnant female, what structure secretes hormones essential for maintaining pregnancy?

Corpus luteum Signup and view all the answers