stages of the menstrual cycle

what gland secretes FSH (follicle-stimulating hormone)

pituitary gland

on what day does the FSH reach its peak?

day 12

what happens in the ovary as FSH rises (during days 1-12)?

the egg starts to mature & LH and estrogen starts to rise

what gland secretes LH (luteinizing hormone)

pituitary gland

on what day does LH rech its peak?

day 13

what happens to the egg in the ovary on day 14 after LH level reach their peak?

the follicle bursts open & releases the egg (ovulation)

what gland secretes estrogen

ovaries

on what day does the estrogen reach its peak concentration?

day 12

what happens to the uterus lining during days 1-12 as estrogen is rising

the lining of the uterus builds up with nurturing tissue & blood

On what day does progesterone reach its peak concentration?

day 21

while progesterone stays at a high level what happens to the lining of the uterus?

it builds up and thickens to a nurturing phase

once progesterone decreases what happens to he lining of the uterus?

it deteriorates

the average menstrual cycle with no fertilization takes place how many days?

28 days

what does the unfertilized egg in the ovary do during days 1-4?

it does not implant in the uterus and exits out the body

what happens to the uterus lining in days 1-4?

it sheds out of the uterus

what does the unfertilized egg in the ovary do during days 5-13?

it starts to mature

what does the uterus lining to on days 5-13?

it starts to build up

describe what happens to the egg during the menstrual cycle of day 14

the egg is released from the follicle and travels through the fallopian tube into the uterus

describe the changes that take place to an egg from day 15-28 if no fertilization occurs

the egg stays in the uterus until mensuration

describe the changes that take place to an egg from day 15-21 if fertilization occurs

the egg will become an embryo and travel down to the uterus to attached to the uterine wall

describe the changes that take place to an egg from day 21-266 if fertilization occurs

the egg develops into the fetus

explain why a female needs a thick uterus lining if fertilization occurs

to prepare for pregnancy and create a suitable environment

explain why a female no long needs a thick uterus lining if fertilization does not occur

the egg hasn't been fertilized so the uterus lining needs to be flushed out

what time during a woman's menstrual cycle is it easiest to become pregnant?

ovulation

what is FSH?

causes egg to mature in ovaries, stimulates the production of estrogen in ovaries

what is LH?

stimulates release of egg at the middle of the menstrual cycle

what is progesterone?

a steroid hormone released by the corpus luteum that stimulates the uterus to prepare for pregnancy.