الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 83 |  |  |
| | | from | 83 | | |
Abstract
• Frozen embryo transfers (FETs) are an integral component of in vitro fertilization (IVF) today, and their use has steadily elevated over the past few decades.
• Embryo transfer (ET) is typically conducted in the midst of the implantation window in IVF cases. The condition of the endometrium on the day of transfer is therefore more indicative of endometrial receptivity than the day of human chorionic gonadotropin (hCG) stimulation or progesterone administration (both precede ET by at least 3–5 days).
• The purpose of this study was to document the dynamic changes in endometrial thickness using two-dimensional transvaginal ultrasound (2D TVUS) at the conclusion of the estrogen phase and on the day of embryo transfer after progesterone administration in hormonally prepared FET cycles. And if endometrial compaction (decreased thickness) affects pregnancy outcomes compared to the endometrium, which expands or remains unchanged.
• Our final data analysis included 307 HRT–FET cycles. Using 2D TVUS, compaction was defined as a ≥5% reduction in EMT, corresponding to a 0.5 mm or more reduction in endometrial thickness between the end of the oestradiol-only phase and the embryo transfer day. Cycles that met this specific criterion were categorized as group I, whereas those who showed less than 5% change in EMT were categorized as group II and those with ≥5% increase in EMT group III.
• 25.73% of the cycles showed endometrial compaction, 33.87% showed no EMT change, and 40.39% showed endometrial expansion.