Abstract Background Timely and moderate luteinizing hormone (LH) supplementation plays positive roles in in vitro fertilization/intracytoplasmic sperm injection and embryo transfer (IVF/ICSI-ET) cycles with long-acting gonadotropin-releasing hormone agonist (GnRHa) pituitary downregulation. However. the appropriate timing of LH supplementation remains unclear. Methods We carried out a... https://vacuumdoctores.shop/product-category/scrub-brushes/