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Birth weight (BW) is higher after frozen embryo transfer (FET) than after fresh embryo replacement. No study has compared the BW of siblings conceived using the same oocyte/embryo cohort. The aim of this study was to determine whether the freezing-thawing procedure is involved in such difference.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Frozen embryo transfer | Frozen embryo transfer | ||
| Fresh embryo transfer | Fresh embryo transfer |
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| Measure | Description | Time Frame |
|---|---|---|
| birthweight | change after FET than after fresh embryo transfer | 1 day |
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Inclusion Criteria:
Exclusion Criteria:
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sibling pairs where fresh embryo replacement resulting in a singleton live birth was followed by transfer of one or two frozen embryos from the same cohort that resulted in a singleton live birth, between May 2007 and June 2015.
Twin pregnancies and stillbirths were excluded. If the BW of at least one sibling was unknown, the pair was not included in the study
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| Name | Affiliation | Role |
|---|---|---|
| Margaux Anav, Doctor | University Hospital, Montpellier | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Uh Montpellier | Montpellier | 34295 | France |
NC
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| ID | Term |
|---|---|
| D007246 | Infertility |
| D001724 | Birth Weight |
| ID | Term |
|---|---|
| D000091662 | Genital Diseases |
| D000091642 | Urogenital Diseases |
| D001835 | Body Weight |
| D012816 | Signs and Symptoms |
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| D013568 |
| Pathological Conditions, Signs and Symptoms |