Menstrual Cycle Flashcards
1
Q
Average cycle length
A
90% between 24-35d
2
Q
Menstrual cycle phases
A
- follicular phase - variable lenth (7-21d), KEY DETERMINANT OF CYCLE LENGTH
- ovulation
- luteal phase - more consisten (>/= 12d)
3
Q
Frequency of menses: types
A
- Frequent = <24d
- Normal = 24-38d
- Infrequent = >38d
4
Q
Regularity of menses (cycle to cycle variation over 12 mos): types
A
- Absent
- Regular = variation +/- 2 to 20days
- Irregular = variation greater than 20d
5
Q
Duration of flow: types
A
- Normal = 4.5-8d
- prolonged = >8d
- Shortened = <4.5d
6
Q
How many hours before ovulation does LH surge (seen in urine)
A
24hrs
7
Q
How many hours before the LH surge does P4 begin to rise?
A
12hrs
8
Q
when is the luteoplacental shift in P4
A
begins at EGA 6wks and is advanced by 9th wk of gestation
9
Q
Progesterone levels during the menstrual cycle
A
- Follicular phase = 3-4mg/d
- Midluteal phase = 25-30mg/d
- Pregnancy at term = 250-300mg/d
10
Q
How many hours after HCG administration does ovulation occur
A
34-46hrs
