What is Ovidrel, and how is the dose usually chosen?
Ovidrel is a medication used to trigger ovulation (hCG). The correct dose depends on the treatment plan (for example, timed intercourse vs. intrauterine insemination vs. IVF) and on your clinic’s protocol.
Because dosing is individualized, the safest answer is to follow the exact dose and instructions your fertility clinic prescribed for you. Using the wrong amount can lead to failed timing or an increased risk of ovarian hyperstimulation syndrome (OHSS).
What is the typical Ovidrel dose most clinics prescribe?
Most commonly, Ovidrel is given as a single trigger injection of 250 micrograms (mcg) (0.5 mL) subcutaneously. This is the standard “trigger shot” dose used in many ovulation-induction and assisted-reproduction protocols.
Your prescriber may adjust instructions based on your ultrasound/bloodwork results, especially if you’re using gonadotropins or have a higher risk for OHSS.
Can the dose be different (and why would it be)?
Yes. The amount and timing can change based on:
- Whether you’re doing IUI, IVF, or timed cycles
- Your estradiol levels and follicle size/number on the day of the trigger
- Your history of OHSS
- Whether you’re using different hCG products or concentrations
If your prescription says a different strength (or different mL), use the directions on your exact product label and prescription.
How to take Ovidrel safely (timing matters as much as dose)
Ovidrel is typically injected once as a trigger, then intercourse or the egg retrieval is timed based on clinic instructions (often about 34–36 hours before planned retrieval or ovulation timing). Do not change the dose or repeat injections unless your clinic tells you to.
What to do if you’re unsure about your prescription or concentration
If you tell me what your label says (for example, “250 mcg/0.5 mL” or anything else) and what your prescription instructions say (including mL or mcg and “inject once” vs “repeat”), I can help you interpret the directions.
If you think you may have already taken the wrong dose, contact your fertility clinic or a clinician promptly.
When to get urgent medical help
Seek urgent care or contact your clinic right away if you have symptoms like severe abdominal pain, rapid weight gain, shortness of breath, or persistent vomiting after triggering, since these can be signs of OHSS.
Sources: None.