I mean, I was reading in your book about how mating and attraction preferences change for a woman throughout her cycle.

Yeah.

So throughout a woman's 28-day cycle, does she always want a nice guy?

No. So women's partner preferences and the types of qualities that women tend to prioritize in their choice of partners do change across the

menstrual cycle. And this changes with our sex hormones. So during the early part of the

menstrual cycle, both sets of sex hormones, so our estrogen and progesterone, which is our

second primary sex hormone, they are low. And then as estrogen begins to increase,

which is something that happens as eggs start to mature in the ovary, and as the eggs are maturing,

they release estrogen. And as an egg, as a dominant egg is chosen and begins to fully mature,

so that way it will be released at ovulation.

Which is how many days into the cycle? Usually estrogen really starts to surge right around day

nine of the cycle, but it really hits its like high point, usually right around day 14,

which is when ovulation occurs. So estrogen begins rising sharply around day

nine of the cycle. And again, the first day of the menstrual cycle is the day that your period arrives.

So that's day one, about day nine, so about a week and a half after your period started,

most women will start to have a pretty dramatic increase in estrogen.

Estrogen will climb, climb, climb, climb, climb. It will peak around day 14, which is when

ovulation occurs. And this is when an egg, of course, is released and pregnancy is possible

from sex. So from day nine till day 15? Yeah, till day 15. Day nine to day 15 are usually,

like that's usually when we sort of bookend the fertile window. And during this time,

not surprisingly, women experience a change in their sexual psychology, right? So women become increasingly attuned to all things sex.

So what we tend to see is that women's sexual desire increases right around that time in the cycle.

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