Community post

Based on your hcg on day 44 and working backwards by half every 48 hours (since hcg doubles approx every 48 hours) it looks like you may have ovulated somewhere between cd 23-27 ish. It's possible implantation was just starting to take place on or around the 16th so your levels may not have been high enough then to get a positive.

Thank you so much for this info, I don't have much knowledge on this stuff and its just hard to understand. All I know is my Husband didn't come back home from work until March 4, 2015, so to be told I was 7 weeks based on my LMP, I was so confused. We actually have been trying to avoid conceiving and had an appt tomorrow 03/31 to get Mirena installed and never thought in a million years I was ovulating that late on March 4th or even later. But you are saying that it is possible that I was ovulating on 03/04 or maybe even later? I started cramping yesterday 03/29 and went to the ER. They did not see baby in ultrasound and my HCG measured 334, which isn't adding up neither based on the doubling every 48 hour theory. I'm just confused, emotional and scared.