Women face unequal costs to their fertility by waiting, compared to men. Peak reproductive years are between the teens and late 20s, while fertility starts to decline at the age of 30. (Some mothers are surprised to learn that women who become pregnant over the age of 35 are sometimes referred to by medical personnel as having a “geriatric pregnancy.”)
Kristen Wiig says her three-years of IVF were extremely "isolating" and there was "a lot of stress and heartache".
Organisms may bear the effects long after the initial exposure - in the form of reduced lifespans, reproductive challenges and other defects passed to offspring.