One verse

Srimad Bhagavatam 6.9.9

6.9.9

शश्वत्कामवरेणांहस्तुरीयं जगृहु: स्त्रिय: । रजोरूपेण तास्वंहो मासि मासि प्रद‍ृश्यते ॥ ९ ॥

sasvat-kama-varenamhas turiyam jagrhuh striyah rajo-rupena tasv amho masi masi pradrsyate

sasvat
perpetual
kama
of sexual desire
varena
because of the benediction
amhah
the sinful reaction for killing a brahmana
turiyam
one fourth
jagrhuh
accepted
striyah
women
rajah-rupena
in the form of the menstrual period
tasu
in them
amhah
the sinful reaction
masi masi
every month
pradrsyate
is visible.

In return for Lord Indra’s benediction that they would be able to enjoy lusty desires continuously, even during pregnancy for as long as sex is not injurious to the embryo, women accepted one fourth of the sinful reactions. As a result of those reactions, women manifest the signs of menstruation every month.