Antepartum fetal testing can be performed after 39 weeks in patients with sub-optimal dating due to concerns for post-term pregnancy . Of all ages surveyed, the older the man became, the more unlikely he was to follow the dating age rule. After that, their maximum age begins to decrease, and they believe they should be with women who are younger than their own age.
No bones about it, fossils are important age markers. One is at the apex of the passionate-love phase. If ultrasound is performed beyond 18 weeks of gestation, a full fetal anatomic survey is possible .