Good morning,
I found an interesting articule about twins, especially where they are boy(s)-girl(s) ala opposite sex. The research discovered that a twin brother's testosterone in the uterus can reduce his female twin's chances of having children. Testosterone can cross membrane barriers is the uterus and a female twin fetus is therefore exposed to a brother's testosterone.
I have a twin brother and me and my dh on TTC for 3years without any bfp signs. I had all tests done the last year, all results came back on normal levels, all his counts were fine too, however I don't know if they test testosterone levels and it was done or not.
I'm here to looking for any advice or any experience who has a twin brother and able to share her journey on TTC.