When undergoing fertility treatments like IUI (Intrauterine Insemination) or IVF (In Vitro Fertilization), timing is everything. One crucial component in these procedures is the “trigger shot.” At Omyafertility, we believe in educating every patient, so here’s everything you need to know about a trigger shot during IUI or IVF.

A trigger shot is an injection of the hormone hCG (human chorionic gonadotropin). Its main purpose is to stimulate the final maturation and release of the egg from the ovary. Once administered, ovulation typically occurs within 36 to 40 hours, making it essential for fertility specialists to time insemination or egg retrieval precisely.

In an IUI cycle, the trigger shot helps ensure the sperm meets the egg at the optimal time, improving the chances of successful fertilization. In IVF, it helps your doctor retrieve mature eggs for fertilization in the lab.

Everything you need to know about a trigger shot during IUI or IVF also includes being aware of the possible side effects. Some women may experience mild bloating, abdominal pain, or mood swings. It's also important to note that the hCG in the shot can cause a false positive on a pregnancy test if taken too soon after administration.