At first I thought she was cranky
because of her horrific MENSTRUAL cramps,
The Big Bang Theory Season 10, Episode 16
Where are you in your MENSTRUAL cycle?
The Big Bang Theory Season 2, Episode 9
Uni, bi, tri, MENSTRUAL,
all cycles are dumb.
The Big Bang Theory Season 10, Episode 22
...and MENSTRUAL cramps.
The Big Bang Theory Season 4, Episode 21