Timing Your Trigger Shot: Optimizing Ovulation for Conception

Issues with Ovulation Induction Injection

After taking ovulation medication, the menstrual cycle is consistently 30 days.
On August 28, a transvaginal ultrasound revealed one follicle measuring 1.8 cm and another measuring 1.6 cm.
It was scheduled to administer the trigger shot on the morning of August 30 between 8 and 10 AM, as ovulation typically occurs around day 17 or 18 of the cycle.
Is it too late to administer the shot on Friday morning between 8 and 10 AM? The doctor advised us to have intercourse on the evening of August 31 between 8 and 10 PM.
Would it be too late to do so at that time?

Zheng Xiaoya, 30~39 year old female. Ask Date: 2019/08/29

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, ovulation typically occurs about 36 hours after administering the ovulation trigger shot.
Therefore, it is recommended to have intercourse around that time, although a little later is also acceptable, so there’s no need to stress too much about the timing.
Sometimes, feeling pressured to meet that specific time can make it difficult for your partner to perform.
Wishing you success in achieving pregnancy soon!

Reply Date: 2019/08/29

More Info

When it comes to timing your trigger shot for ovulation, understanding the ovulation cycle and the mechanics of the trigger shot is crucial for optimizing conception. Based on your description, you have a regular menstrual cycle of 30 days, with ovulation typically occurring around days 17 to 18. You have also had a transvaginal ultrasound that indicated the presence of two follicles measuring 1.8 cm and 1.6 cm, which are promising signs for ovulation.

The trigger shot, often containing human chorionic gonadotropin (hCG), is used to induce ovulation. It is typically administered when the follicles are mature enough, usually when they reach a size of about 18-20 mm. Given that your follicles are already at 1.8 cm and 1.6 cm, they are close to maturity, and the timing of your trigger shot is critical.

You mentioned that the trigger shot is scheduled for the morning of August 30th, between 8-10 AM. This timing is generally appropriate, as the hCG shot typically induces ovulation within 36-40 hours. Therefore, if you administer the shot on the morning of August 30th, you can expect ovulation to occur sometime between the evening of August 31st and the morning of September 1st.

Regarding your concern about whether having intercourse on the evening of August 31st (8-10 PM) would be too late, it is actually well-timed. Since ovulation is expected to occur within that timeframe, having intercourse on the evening of August 31st would maximize the chances of sperm meeting the egg. Sperm can survive in the female reproductive tract for up to five days, so having intercourse on the day of ovulation or the day before is ideal.

In summary, the timing of your trigger shot on August 30th is appropriate, and having intercourse on the evening of August 31st is also well-timed to optimize your chances of conception. It is essential to follow your doctor's recommendations closely and maintain open communication with them regarding any concerns or questions you may have about the process.

Additionally, it is important to consider other factors that can influence conception, such as maintaining a healthy lifestyle, managing stress, and ensuring that both partners are in good health. If you have any underlying health conditions or concerns about fertility, discussing these with your healthcare provider can provide further guidance tailored to your specific situation. Good luck, and I hope you achieve your goal of conception soon!

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