Tetrasomy X
MONDO:0019525Tetrasomy X is a sex chromosome anomaly caused by the presence of two extra X chromosomes in females (48,XXXX instead of 46,XX).
Also known as: 48,XXXX syndrome, quadruple X, tetra X, tetrasomy type X, 48 XXXX, 48 XXXX syndrome
81 clinical trials for this condition and its sub-types.
Follow this condition — get notified about new trialsBroader categories
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New IVF drug trial halted early: did it help embryo growth?
Disease control TerminatedThis early-stage trial tested whether adding the drug FE999302 to standard IVF hormones could increase the number of high-quality embryos in women undergoing fertility treatment. The study enrolled 310 women aged 18–40 with specific hormone levels. The trial was terminated early,…
Phase: PHASE1 • Sponsor: Ferring Pharmaceuticals • Aim: Disease control
Last updated Jun 27, 2026 12:02 UTC
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Timing of fertility drug may affect egg quality in IVF
Disease control TerminatedThis early-phase study looked at whether giving an extra fertility drug (FE 999302) at different times during ovarian stimulation could improve the number of good-quality embryos in women undergoing IVF. The trial included 106 women with high ovarian reserve and was stopped early…
Phase: PHASE1 • Sponsor: Ferring Pharmaceuticals • Aim: Disease control
Last updated Jun 27, 2026 12:02 UTC
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Does Dad's smoking harm fertility? new study investigates
Knowledge-focused TerminatedThis study looked at how a man's smoking habits might affect a couple's ability to have a baby. Researchers compared fertile and infertile couples, measuring smoking markers like carbon monoxide and cotinine in blood, semen, and hair. The goal was to understand if smoking damages…
Phase: NA • Sponsor: Centre Hospitalier Universitaire, Amiens • Aim: Knowledge-focused
Last updated Jun 27, 2026 13:07 UTC