Transfer
Natural-cycle FET beats medicated, even over 40
Natural preparation gave higher ongoing-pregnancy rates than HRT for euploid embryos.
1.5x Oddshigher ongoing pregnancy
Research
Studies that matter for women over 38, explained and tagged by topic.
Browse by stage of the IVF funnel
Studies
8 studies
Testing
Five euploid transfers reach 96 to 99% live birth
Across 123,987 patients, this study found true recurrent implantation failure was under 2%.
96 to 99.6%live birth after five transfers
▷ InteractiveEggs
Growth hormone lifts live-birth odds in women over 40
Pooled trials show higher clinical-pregnancy and live-birth odds with growth hormone in women over 40.
4.12xhigher live-birth odds, 40+
Transfer
Correcting low ferritin roughly doubled live birth
An iron infusion for ferritin at or below 30 raised live birth, even with normal haemoglobin.
26% → 51%live birth rate after iron infusion
Sperm
Microfluidic sperm selection beats swim-up
The SwimCount Harvester delivered better sperm and more usable blastocysts than swim-up.
40.5%usable blastocyst rate (vs 34.5% swim-up)
Fertilise
Calcium ionophore: proven for failed fertilisation
Assisted oocyte activation roughly doubled pregnancy and live birth when fertilisation had failed.
2xlive birth rate
Testing
Mosaic embryos, ranked: which to transfer first
1,000 transfers show mosaics work, and which types give the best chance at a live birth.
1,000mosaic transfers ranked
▷ InteractiveSperm
Selecting sperm by hyaluronan binding cut miscarriage
In the HABSelect trial, PICSI cut miscarriage from 7.0% to 4.3%, with the benefit concentrated in older women.
7.0% → 4.3%miscarriage, a 39% relative drop
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