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Which hormone maintains the corpus luteum during early pregnancy?

What is the function of the ductus venosus in fetal circulation?

Which type of hormone binds to intracellular receptors?

Which muscles contract during ejaculation to expel semen?

Which structure of the vulva is homologous to the male scrotum?

How many umbilical arteries and veins are present in the umbilical cord?

Which hormone is released in response to low blood glucose levels?

What occurs during the follicular phase of the ovarian cycle?

Which hormone helps prepare the mammary glands for lactation during pregnancy?

What is a common cause of ectopic pregnancy?