In women, it is caused for example, by reduced ovarian reserve, an abnormal ovulation (polycystic ovary syndrome, etc.), and many factors associated with the uterine tube (adhesions, obstruction) and the uterus (polyps, leiomyoma) [2]
Always check the manufacturer's guidelines to determine if refrigeration is necessary
Reconstitution recommendation many research-grade vials note the recommended diluent (typically bacteriostatic water )
Take collagen peptides, for instance
Gerstein HC, Miller ME, Byington RP et al (2008) Effects of intensive glucose lowering in type 2 diabetes
Both doses produced large weight-loss effects, but dropout from gastrointestinal adverse events was higher at 12 mg than at 9 mg