The review found no eligible studies for this question.
It is very uncertain whether in vitro maturation changes clinical pregnancy compared with in vitro fertilisation (very low certainty).
Metabolomics showed no clear difference in live birth rate (Delivery of a live fetus after 20 completed weeks… compared with non metabolomics (low certainty).
Metabolomics showed no clear difference in live birth rate or ongoing pregnancy (Delivery of a live fetus after… compared with non metabolomics (low certainty).
Metabolomics showed no clear difference in miscarriage (Loss of pregnancy before 20 completed weeks of gestation) compared with non metabolomics (low certainty).
Metabolomics showed no clear difference in clinical pregnancy (Presence of a fetal heart on ultrasound scan at… compared with non metabolomics (low certainty).
Metabolomics may leads to higher cancellation (Exclusion of a patient after recruitment) compared with non metabolomics (low certainty).
Metabolomics showed no clear difference in multiple pregnancy (presence of more than 1 gestational sac) compared with non metabolomics (low certainty).
It is very uncertain whether metabolomics changes ectopic pregnancy (a pregnancy in which the fetus develops outside… compared with non metabolomics (very low certainty).
Ultrasound‐guided embryo transfer may leads to higher live birth and ongoing pregnancy (per woman randomised) compared with clinical touch (low certainty).
Ultrasound‐guided embryo transfer may leads to higher live birth compared with clinical touch (low certainty).
Ultrasound‐guided embryo transfer probably leads to higher ongoing pregnancy compared with clinical touch (moderate certainty).
Ultrasound‐guided embryo transfer probably leads to higher clinical pregnancy (per woman randomised) compared with clinical touch (moderate certainty).
Ultrasound‐guided embryo transfer showed no clear difference in multiple pregnancy (per woman randomised) compared with clinical touch (moderate certainty).
Ultrasound‐guided embryo transfer showed no clear difference in miscarriage (per woman randomised) compared with clinical touch (moderate certainty).
Ultrasound‐guided embryo transfer showed no clear difference in ectopic pregnancy (per woman randomised) compared with clinical touch (moderate certainty).
It is very uncertain whether progesterone changes live birth or ongoing pregnancy compared with progesterone + GnRH agonist (very low certainty).
Progesterone may leads to lower clinical pregnancy compared with progesterone + GnRH agonist (low certainty).