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  • Title: Home-based monitoring of ovulation to time frozen embryo transfers in the Netherlands (Antarctica-2): an open-label, nationwide, randomised, non-inferiority trial.
    Author: Zaat T, de Bruin JP, Goddijn M, van Baal M, Benneheij S, Brandes M, Broekmans F, Cantineau A, Cohlen B, van Disseldorp J, Gielen S, Groenewoud E, van Heusden A, Kaaijk E, Koks C, de Koning C, Klijn N, van der Linden P, Manger P, Moolenaar L, van Oppenraaij R, Pieterse Q, Smeenk J, Visser J, van Wely M, Mol F.
    Journal: Lancet; 2023 Oct 14; 402(10410):1347-1355. PubMed ID: 37678290.
    Abstract:
    BACKGROUND: The growing field of assisted reproductive techniques, including frozen-thawed embryo transfer (FET), should lead the way to the best sustainable health care without compromising pregnancy chances. Correct timing of FET is crucial to allow implantation of the thawed embryo. Nowadays, timing based on hospital-controlled monitoring of ovulation in the natural cycle of a woman is the preferred strategy because of the assumption of favourable fertility prospects. However, home-based monitoring is a simple method to prevent patient travel and any associated environmental concerns. We compared ongoing pregnancy rates after home-based monitoring versus hospital-controlled monitoring with ovulation triggering. METHODS: This open-label, multicentre, randomised, non-inferiority trial was undertaken in 23 hospitals and clinics in the Netherlands. Women aged between 18 and 44 years with a regular ovulatory menstrual cycle were randomly assigned in a 1:1 ratio via a web-based randomisation program to home-based monitoring or hospital-controlled monitoring. Those who analysed the data were masked to the groups; those collecting the data were not. All endpoints were analysed by intention to treat and per protocol. Non-inferiority was established when the lower limit of the 90% CI exceeded -4%. This study was registered at the Dutch Trial Register (Trial NL6414). FINDINGS: 1464 women were randomly assigned between April 10, 2018, and April 13, 2022, with 732 allocated to home-based monitoring and 732 to hospital-controlled monitoring. Ongoing pregnancy occurred in 152 (20·8%) of 732 in the home-based monitoring group and in 153 (20·9%) of 732 in the hospital-controlled monitoring group (risk ratio [RR] 0·99 [90% CI 0·81 to 1·22]; risk difference [RD] -0·14 [90% CI -3·63 to 3·36]). The per-protocol analysis confirmed non-inferiority (152 [21·0%] of 725 vs 153 [21·0%] of 727; RR 1·00 (90% CI 0·81 to 1·23); RD -0·08 [90% CI -3·60 to 3·44]). INTERPRETATION: Home-based monitoring of ovulation is non-inferior to hospital-controlled monitoring of ovulation to time FET. FUNDING: The Dutch Organisation for Health Research and Development.
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