Study designs of evaluations included in the review
The studies had to report data on AFC and IVF outcomes to be eligible for inclusion. All of the included studies were diagnostic cohort studies.
Specific interventions included in the review
Studies that evaluated AFC under transvaginal ultrasonography were eligible for inclusion. Where reported, the ultrasonographic probes used in the included studies ranged from 4 to 7.5 MHz.
Reference standard test against which the new test was compared
The reference standard used was the occurrence of poor ovarian response and/or nonpregnancy. Poor response encompassed cycle cancellation, insufficient follicular growth or oocyte yields, according to the definition in the individual studies.
Participants included in the review
Studies of patients undergoing IVF treatment were eligible for inclusion. Most of the included studies reported on the outcome of one cycle per couple; others reported on the outcome of multiple outcomes.
Outcomes assessed in the review
The studies had to 2x2 data on AFC and ovarian response to be eligible for inclusion. Some studies used the data of more than one IVF cycle per couple.
How were decisions on the relevance of primary studies made?
One reviewer screened the abstracts to determine inclusion.