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Table 2 Summary of data published about factor that may affect 3D-ultrasound assessment of menstrual cycle

From: Three-dimensional ultrasound assessment of endometrial receptivity: a review

Author n Primary Outcome 3D Method Study Design Findings
Ng (52) 67 Endometrial and subendometrial vascularity in spontaneous and stimulated cycles VOCAL Cross-sectional: oocyte retrieval day in stimulated cycles and LH surge day in spontaneous cycles Endometrial and subendometrial vascularity was significantly lower in stimulated cycles as compared with spontaneous cycles
Ng (53) 645 Endometrial and subendometrial vascularity in spontaneous and stimulated cycles VOCAL Cross-sectional: oocyte retrieval day in stimulated cycles and LH surge day in spontaneous cycles Uterine PI and RI were weakly correlated with endometrial and subendometrial VI/FI/VFI, both in spontaneous and stimulated cycles.
Chan (54) 60 Endometrial volume, and endometrial and subendometrial vascularity VOCAL Cross-sectional: oocyte retrieval day Endometrial and subendometrial VI/FI/VFI are not affected by different r-hCG dosage
Ng (55) 32 Endometrial and subendometrial vascularity in stimulated cycles VOCAL Longitudinal hCG +2, hCG +4, hCG +7 Changes in endometrial and subendometrial VI/FI/VFI are different in excessive responders as compared with moderate responders.
Raine-Fenning (56) 48 Endometrial and subendometrial vascularity in fertile and unexplained subfertile women VOCAL Longitudinal at 2 days interval in follicular phase and 4 days interval in luteal phase Endometrial and subendometrial VI/FI/VFI were significantly lower in women with unexplained subfertility
Ng (57–59) 645 Endometrial and subendometrial vascularity VOCAL Cross-sectional Oocyte retrieval Endometrial and subendometrial VI/FI/VFI are not affected by women's age, smoking, type and cause of infertility, presence of hydrosalpinx or uterine fibroids