Findings

What do systematic reviews say?

7 questions · 7 findings · 1 reviews · Gynaecology and Fertility

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No studies found 3 · 42.9%GRADE not reported 0 · 0%Very low 2 · 28.6%Low 2 · 28.6%Moderate 0 · 0%High 0 · 0%

HT FET vs HT + GnRHa FET

Miscarriage · women with primary or secondary subfertility

HT FET showed no clear difference in miscarriage rate per woman compared with HT + GnRHa FET (low certainty).

1 finding from 1 review

Cycle regimens for frozen‐thawed embryo transfer 2017 · Cochrane Headline outcomes only
OR 0.64 [0.37, 1.12]
6 studies · 991 participants
Low

HMG FET vs clomiphene + HMG FET

Miscarriage · subfertile women

It is very uncertain whether HMG FET changes miscarriage rate per woman compared with clomiphene + HMG FET (very low certainty).

1 finding from 1 review

Cycle regimens for frozen‐thawed embryo transfer 2017 · Cochrane Headline outcomes only
OR 1.33 [0.35, 5.09]
1 study · 209 participants
Very low

Natural cycle FET vs modified natural cycle FET (HCG trigger)

Miscarriage · subfertile women

It is very uncertain whether natural cycle FET changes miscarriage rate per woman compared with modified natural cycle FET (HCG trigger) (very low certainty).

1 finding from 1 review

Cycle regimens for frozen‐thawed embryo transfer 2017 · Cochrane Headline outcomes only
OR 0.2 [0.01, 4.13]
1 study · 168 participants
Very low

Natural cycle FET vs HT FET

Miscarriage · subfertile women

The review found no eligible studies for this question.

1 finding from 1 review

Cycle regimens for frozen‐thawed embryo transfer 2017 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Natural cycle FET vs HT + GnRHa FET

Miscarriage · subfertile women

The review found no eligible studies for this question.

1 finding from 1 review

Cycle regimens for frozen‐thawed embryo transfer 2017 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Modified natural cycle FET (HCG trigger) vs HT FET

Miscarriage · subfertile women

The review found no eligible studies for this question.

1 finding from 1 review

Cycle regimens for frozen‐thawed embryo transfer 2017 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Modified natural cycle FET (HCG trigger) vs HT + GnRHa FET

Miscarriage · subfertile women

Modified natural cycle FET (HCG trigger) showed no clear difference in miscarriage rate per woman compared with HT + GnRHa suppression FET (low certainty).

1 finding from 1 review

Cycle regimens for frozen‐thawed embryo transfer 2017 · Cochrane Headline outcomes only
OR 0.74 [0.25, 2.19]
1 study · 236 participants
Low