Oddbean

UNBELIEVABLY this article panders to the idea that men can have babies, literally! but here it is, the fax: > The average person’s menstrual cycle is between 28 and 32 days. Some people have shorter cycles, while others have much longer ones. > The first day of a person’s period is the first day of their menstrual cycle. Their period typically lasts 3 to 7 days. > According to The American College of Obstetricians and Gynecologists (ACOG), a person whose menstrual cycle is between 26 days and 32 days long will be most fertile between days 8 and 19 of their cycle. so, yes, i am wrong, fertility is about 11 days out of 28-32, so, about 1/3 of the time a woman is fertile, that's still a pretty wide margin for a woman wanting to have sex without being fertilized

no, the beginning of the cycle is counted from when they bleed. when they bleed they are not fertile, the ground on which the egg would attach is being shed they are fertile for about a week to 11 days immediately prior to the bleed... so if they bleed for 5 days (typical) and are fertile for a week (typical) then out of 28 days that's 12 days they can't have sex for, and it should be noted that during that fertile period their hormones fuck with their brains and make them want sex more so, that's 16 days or a bit over 2 weeks of the month they can fuck with impunity, if they know what the state of their system is

i was wrong by a factor of 2, not 5 as you suggest also i doubt that 11 days is typical for a woman with an average 28 day cycle (which is more than the majority), i'd guess it's more like 7-9 days i've witnessed this stuff in real time in a woman who was taking synthetic fertility drugs, and i remember it was about a week that her mucus went waxy and smelled funny... sex wasn't as fun in this time either and anyhow, the upshot of this is that sampling from a random day on any given month, it's at best a 1/3 chance you might impregnate a woman, 50/50 if you include that she's not going to do sex while she's bleeding, since the end of the cycle it's unlikely to take (takes around 36 hours) and you can offset that first 24 hours as being the time when it's possible the ovum arrives while the sperm are still viable the point is that nobody is more qualified to evaluate this and selling women a pill to take every day that they could just instead do a thermometer and mucus test, come on, whose interests are served by this perversion of the mothering instincts?

let your own words betray you, just before i block you: “are only fertile for about 4 days a month and shortly thereafter bleed for 3-5 days” You have that wrong 😜. It's the other way around what does 'shortly thereafter' mean? fertile 4 days, bleeding 3-5 days i was wrong. 11-7 days fertile i did not get the ordering wrong