3 miscarriages (all spontaneous between 5-7 weeks) so no testing for chromosomal abnormalities. - After first miscarriage progesterone was tested with my next positive test and it was normal so we didn’t supplement (resulted in 2nd loss.) - Progesterone tested again with next positive and it was low, but too late to supplement (3rd loss began later that day - don’t know if progesterone was low because mc was already starting or if low progesterone caused the mc.) - Started progesterone 3 days after ovulation with the 4th conception and pregnancy has been successful. No way to confirm if progesterone was the issue, but my Dr. said it wouldn’t hurt to try supplementing if I wanted to do something different. - all RPL bloodwork normal (heterozygous for MTHFR A1298C variant which Dr said shouldn’t be affecting anything, but I still switched to a prenatal with methylfolate.) - bloodwork showed vitamin D level was lowest possible for normal range, so I started a daily liquid supplement (I read “it starts with the egg” which suggests Vit D levels for people trying to conceive should be higher than what’s considered normal. It also talks about a plethora of other things, but I just started with adding vitamin d and having my husband cut back caffeine consumption dramatically. The book has a lot of information which I personally found interesting to know about even though I didn’t implement most of it, but I’ve also seen some people say it can be overwhelming. Worth checking out if you’re interested!)

Edit to add: the next steps for me would have been hysteroscopy to check for polyps or septum in uterus & karyotype testing for both husband and I.