First, it was retrospective, which means it relied on patients recalling their experiences months laterthis is far less reliable than a controlled, prospective study
Inhibition of hCG production by prolactin from term research subjects trophoblast [PMID: 3946520] Laboratory literature summary: Inhibition of hCG production by prolactin from term research subjects trophoblast
For additional information on Vitamin B12 deficiency have a read of this blogpost
Pickart, L., Vasquez-Soltero, J., Pickart, F., & Majnarich, J
This 15-amino acid peptide reduces production of key inflammatory mediators including IL-1, TNF-, and nuclear factor kappa B (NF-B), which are consistently elevated in women with endometriosis
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