Commonly suggested biomedical hypotheses to explain PAIS (such as in long COVID/PASC, ME/CFS) are chronic stimulation of the immune system by a persistent infection or persistent unviable pathogen structures
268 More advanced imaging of the uterus (saline infusion sonogram or hysteroscopy) and fallopian tubes (hysterosalpingogram or laparoscopy) may be recommended to rule out uterine problems, endometriosis, adhesions, or other blockages, especially in women with normal antral follicle counts and AMH levels
If you are using injection type peptides, proper reconstitution and sterile handling techniques are essential for preventing contamination and maintaining the peptides' integrity
For multi-dose vials, yes
Jeong EM, Yoon JH, Lim J, Shin JW, Cho AY, Heo J, Lee KB, Lee JH, Lee WJ, Kim HJ, Son YH, Lee SJ, Cho SY, Shin DM, Choi K, Kim IG
Neuroscience & Biobehavioral Reviews, 6 (2), 177182