What time of day should I take Ovidrel (hCG) to time ovulation?
Ovidrel (choriogonadotropin alfa) is usually given at a scheduled point in an IVF or fertility cycle to trigger ovulation. Clinics typically instruct patients to take it at a specific time and then time intercourse or egg retrieval around that trigger. Because the goal is to hit a consistent window for ovulation timing, the “best” time of day is generally the time your clinician prescribes for your cycle, not a time based on day/night differences.
Does morning vs evening make a difference?
Ovidrel is designed to trigger ovulation regardless of time of day; what matters is the timing relative to your treatment plan (for example, when you’re told to have intercourse, do an IUI, or schedule an egg retrieval). If you have a choice, many clinics simply aim for a time that you can reliably follow and that fits clinic monitoring and retrieval schedules.
What if my appointment times change?
If your clinic changes your monitoring or you can’t take the injection at the originally planned hour, you should contact your fertility team for updated instructions. Small shifts can affect when ovulation occurs, so don’t adjust the schedule on your own.
Practical guidance that clinics commonly use
Follow these general principles from your prescribing team:
- Take Ovidrel exactly when it’s scheduled in your cycle plan.
- Don’t delay or shift the trigger without checking with your clinic.
- Ask your clinic what timing they want for intercourse/IUI or for egg retrieval relative to the injection time.
Where to look in your own instructions
Your specific recommendation depends on your protocol (IUI vs IVF, fresh vs frozen cycle, trigger strategy, and how your clinic schedules procedures). The most reliable answer is the timing written in your medication plan from your fertility clinic.
If you tell me whether you’re using Ovidrel for IUI, timed intercourse, or IVF (and what time your clinic told you), I can help you interpret how that timing is typically used.