Fertility treatments often involve a carefully coordinated combination of medications designed to support and enhance your body’s reproductive processes. Whether you’re undergoing IVF, IUI, or preparing an embryo transfer, each medication plays a specific role in regulating and optimizing your hormones to create the ideal conditions for ovulation, fertilization, and implantation. Understanding how and why these medications are used can make the process feel more manageable and empowering as you move through your fertility journey.

Clomid and Letrozole

Clomid and letrozole are both oral medications used to help follicles grow during a treatment cycle. They achieve similar outcomes through different mechanisms. Clomid (clomiphene citrate) works by blocking estrogen receptors in the brain, which tricks the body into producing more follicle-stimulation hormone (FSH). Letrozole, an aromatase inhibitor, lowers estrogen levels, which also leads to increased FSH production. These medications are most commonly used in IUI cycles but can also be used in IVF.

Injectable Gonadotropins

Oftentimes, particularly during IVF, patients use injectable gonadotropins such as Gonal-F, Follistim, or Menopur. These are most commonly used in IVF cycles but can also be used in some IUI cycles. These medications contain FSH (and in the case of Menopur, both FSH and LH).

They directly stimulate the ovaries to grow multiple follicles, which is the goal in IVF— unlike a natural cycle, where typically only one follicle develops. Because multiple follicles are growing, the ovaries can become enlarged, which often leads to bloating and discomfort during treatment.

Trigger Shots

Trigger shots are used to induce final maturation of the eggs and prepare them for ovulation when the patient is ready for egg retrieval. The trigger shot is usually taken at night, and the retrieval is scheduled about 36 hours later. Two common types of trigger shots are hCG triggers and Lupron (leuprolide) triggers. An hCG trigger shot mimics the body’s natural LH surge and directly stimulates the final maturation of the eggs. A Lupron trigger shot works by stimulating the pituitary gland to release a surge of LH and FSH, which then leads to egg maturation. Lupron triggers are often used in patients at higher risk of ovarian hyperstimulation syndrome (OHSS) because they reduce that risk.

Preventing Premature Ovulation

Sometimes, a low-dose Lupron injection is used not as a trigger but throughout the cycle to prevent premature ovulation. This works by suppressing the pituitary gland after an initial stimulation phase. In some protocols, progesterone may also be used to help prevent premature ovulation. This is especially important during IVF, because ovulation would release the eggs before retrieval, and the goal is to collect them directly from the ovaries at the appropriate time.

Progesterone Support

While oral progesterone is used for preventing premature ovulation, progesterone is more commonly administered vaginally or via intramuscular injection after ovulation. In this phase, it supports the uterine lining and helps prepare it for implantation before and after embryo transfer.

GnRH Antagonists

If your doctor uses antagonists during a cycle, these are typically medications like cetrorelix (Cetrotide) or ganirelix. These are GnRH antagonists, which work by immediately blocking GnRH receptors in the pituitary gland. This suppresses the release of LH and prevents a premature LH surge, helping ensure that ovulation does not occur before the planned egg retrieval.

Final Thought: Take the Next Step

If you’re preparing for fertility treatment or have questions about which medications are right for you, speak with a fertility specialist to develop a personalized plan and move forward with confidence.

Contact Beverly Hills Fertility today!