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Premature ovulation after ovarian ultrasonography
British Journal of Obstetrics and Gynaecology
|September 1, 1982
Summary
Ovarian ultrasounds during the late follicular phase may trigger premature ovulation. This finding suggests a need to re-evaluate the timing of ovarian scanning in women undergoing ovulation induction.
Area of Science:
- Reproductive endocrinology
- Gynecological imaging
Background:
- Follicle rupture typically occurs after 37 hours post-ovulatory stimulus.
- The timing of ovulation is crucial for successful conception and assisted reproductive technologies.
Purpose of the Study:
- To investigate the impact of transvaginal ultrasonography on ovulation timing.
- To determine if ovarian scanning influences the occurrence of premature ovulation.
Main Methods:
- Ultrasound examinations were performed during the late follicular phase in women undergoing ovulation induction.
- Ovulation timing was assessed in relation to the ovulatory stimulus (LH surge or hCG administration).
- Comparison of ovulation timing between patients undergoing ultrasonography and control groups.
Main Results:
- Ovulation occurred between 26 to 36 hours post-stimulus in women undergoing ultrasonography.
- Premature ovulation was observed in a significant proportion of cycles with late follicular phase scanning.
- No premature ovulation was noted before 37 hours in the control group.
Conclusions:
- Transvaginal ultrasonography during the late follicular phase may be associated with premature ovulation.
- The findings necessitate a re-evaluation of the current protocols for ovarian scanning timing.
- Further research is needed to understand the mechanism behind this observation and its clinical implications.