LMP in ultrasound is March 28 po it means po ba nagstart mabuo si baby month of March or April ?

Possible nabuo si baby during your fertile period after your LMP nung March 28. Usually super fertile ka ng Day 11 to 14 ng period mo. But even that not sure kung yun yung actual days na nagconceive ka. It’s not an exact science and there’s no better way to track the gestational age but thru an ultrasound.