[…] cramping, hot flashes, bloating, bleeding, bruising at the injection site, stress, depression Risks: Ovarian Hyper Stimulation Syndrome (OHSS), during which fertility drugs cause the ovaries to swell and become painful, which can cause abdominal pain, diarrhea [docshop.com]

According to recent reports (Cimadomo ed. 2016) the acquisition of several trophoblastic cells from an embryo at the blastocyst stage is safer than the cell removal of a 3-day embryo in the context of implantation.” dr. [ivita.eu]