Duggar Challenge 2.0

I just found this challenge but to make it challenging to conceive that many children I would alter the woohoo/try for baby rule given that if we are imitating humans women aren't fertile 365 days a year, for about a week in every menstrual cycle (up to 3 days either side of ovulation if you're being generous) there is a chance of conception. I usually play as 2 days out of 7 (so slightly more than the 1 week in 4 of real humans) are potentially fertile (try for baby) and use MC command centre to add a 10% risky woohoo for those times when the woman's cycle is a different length to normal.