Conception date —> Birth date... HELP!

Hello ladies! We’ve been trying for 6 months now, and even though it kills me... I think we’re gonna take a couple months off BECAUSE I have it in my head that I don’t want to give birth at the very end of the year (mostly for education/development reasons)... I’d rather my child have a birthday between January and like... August ish.

Anyways, I’m wondering if you guys can help me figure out when the birth dates would be if we conceived during one of my next 3 ovulation dates. I’ve always been confused of the timeline from birth to conception, is it 9 or 10 months?

Next 3 ovulation dates: February 10, March 9, April 5.

Thanks in advance!!!