female reproduction

menstrual phase days

1-5

follicular phase days

1-13

ovulation phase days

around day 14

luteal phase days

15-18

menstrual phase hormones

LH/FSH is low

LH goes up when progesterone goes down

estrogen/progesterone is low

follicular phase hormones

FSH/LH slightly increase

estrogen increases more at end

ovulation hormones

fsh/LH increase rapidly

high estrogen

luteal phase hormones

estrogen/progesterone hits high enough to stop FSH/LH

corpus luteum secretes large amounts of progesterone

if no baby, corpus luteum dies and progesterone goes down

menstrual phase what’s happening

shedding the uterine lining

follicular phase what’s happening

egg matures, lining rebuilds

ovulation phase what’s happening

egg is released

luteal phase what’s happening

uterus prepares for baby or period

day 14 of fertilization

egg is released

day 15 of fertilization

fertilization occurs

day 16 of fertilization

zygote forms

day 17 of fertilization

morula forms

ball of 16 cells

day 18-19 of fertilization

blastocyst forms

embryoblast- inner cell mass

trophoblast-outer cell mass

day 20-21 of fertilization

blastocyst hatches from zona pellucida

day 21-22 of fertilization

implantation begins

day 22-24 of fertilization

hcg secretion begins to keep corpus luteum alive