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Hey ladies, just came across this on another forum
So, based on what I read above, that "implantation bleed" was very nearly a second miscarriage??? and anyone TTC who experiences "implantation bleeding" should consider supplementing progesterone?
(note to any pregnant mamas reading this: spotting past 20dpo was not included in this study and the placenta is beginning to form by then, so spotting past 5 weeks can be from subchorionic hematoma etc not only progesterone dropping)
The phrase "Implantation" Bleeding is popular on conception forums but is a bit of a misnomer that causes some people to think that the bleeding is due to the embryo implanting. It isn't -- the embryo is only about 0.2mm in diameter at that point, and won't displace significant blood (or cause pain) when it implants. You bleed when progesterone levels in your body drop, which is why you can induce a period by stopping birth control pills (which contain progesterone) or by taking and then stopping progesterone suppositories or Provera (which are also progesterone). Progesterone levels dropping in the luteal phase can be caused by a) increased estrogen in the mid-luteal-phase estrogen surge, which briefly depresses estrogen production, or b) a decrease in progesterone when the corpus luteum runs out of gas at the end of the luteal phase. If b), and you're actually pregnant, your levels can drop briefly before the embryo starts producing enough HCG to tell the corpus luteum to ramp the levels up. Either way, luteal phase spotting can either be a neutral sign (in the case of mid-luteal phase spotting) or a negative sign (in the case of late luteal phase progesterone dropping), but it doesn't have anything to do with implantation, and is not a positive sign of being pregnant.
Sources: Spotting during the luteal phase and the effect on the probability of pregnancy - Countdown to pregnancy Menstrual Cycle - Women's Health Issues - Merck Manuals Consumer Version
As some of you know I had "implantation bleeding" around the time my period was due this cycle when I got my BFP (CD 26, my average cycle from aug 2018 to aug 2020 was 26 days but since then been 30-32 days) and the cycle previous to that, I had a chemical/early mc which started, again, around the day my period was due, CD29 that time.Sources: Spotting during the luteal phase and the effect on the probability of pregnancy - Countdown to pregnancy Menstrual Cycle - Women's Health Issues - Merck Manuals Consumer Version
So, based on what I read above, that "implantation bleed" was very nearly a second miscarriage??? and anyone TTC who experiences "implantation bleeding" should consider supplementing progesterone?
(note to any pregnant mamas reading this: spotting past 20dpo was not included in this study and the placenta is beginning to form by then, so spotting past 5 weeks can be from subchorionic hematoma etc not only progesterone dropping)