Exam 1 - Zygote Stage

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Last updated 9:06 PM on 2/16/26
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15 Terms

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Preconception

Week 1-2

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Conception

Week 3

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Implantation

Week 4

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Steps in Ovulation

Hypothalamus releases gonadotropin

FSH & LH mature + stimulate the release of oocyte

Ruptured follicle becomes corpus luteum

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Gonadotropin

Stimulates pituitary gland to release FSH + LH

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FSH

Matures follicle/oocyte

Stimulates ovary to produce estrogen

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LH

Stimulates mature oocyte to be released (ovulation)

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Fertilized Corpus Luteum

Produces progesterone + estrogen

<p>Produces progesterone + estrogen</p>
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Unfertilized Corpus Luteum

Becomes corpus luteum cyst

Progesterone + estrogen levels drop -> menstruation

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How long can a corpus luteum cyst be seen?

Up to 12 weeks

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Estrogen & Progesterone

Thicken endometrium

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Decidualization

Changes in endometrium that allow for implantation

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hCG

Human chorionic gonadotropin

Hormone produced by immature placenta

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hCG Trends

3-8 weeks - rises rapidly

8-12 weeks - peaks

12-20 weeks - decreases

20 weeks - plateaus

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hCG levels peak at...

~150,000 mIU/ml