Clinical trial Recruiting at 3 sites Observational Ages 8 and up

Tracking growth, puberty, fertility, and pregnancy in people with sickle cell anemia

Official title: A Prospective Longitudinal Study of Growth, Development, Fertility and Reproductive Outcomes Among Adolescents and Young Adults With Sickle Cell Anemia With Hydroxyurea

Run by Children's Hospital Medical Center, Cincinnati · NCT07116772 · Data updated 2026-11-12

This study will see if taking hydroxyurea changes growth, puberty, fertility, or pregnancy outcomes in people with sickle cell anemia.

More Sickle Cell Anemia trials

Quick facts

Study typeObservational
Ages8 Years and up
SexAll
Enrollment250 (estimated)
SponsorChildren's Hospital Medical Center, Cincinnati
Academic / other
Locations3 sites (Santo Domingo and 2 other locations)
StatusRecruiting
StartedJuly 10, 2023
Main results expectedMay 19, 2035
Study endsDecember 31, 2035
Registry record updatedFebruary 4, 2026
Trial IDNCT07116772 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are people aged 8 years or older with documented sickle cell anemia who are enrolled in EXTEND or SACRED and willing to attend regular clinic visits and tests and provide informed consent.

Probably not a fit

People currently enrolled in other treatment trials or those who received other sickle cell treatments in the prior six months, and individuals not of reproductive potential or uninterested in fertility information, are unlikely to gain direct benefit from these fertility-focused outcomes.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a long-term, international observational cohort that follows people with documented sickle cell anemia over time to record development and reproductive outcomes. Participants attend clinic visits every few months for clinical assessments and blood tests, with post-menarche girls having pregnancy tests every six months and boys optionally providing semen samples. The cohort will include people who are and are not taking hydroxyurea, allowing comparison of outcomes by medication exposure while collecting regular self-reported and clinical data. Enrollment generally requires being at least 8 years old and already enrolled in the EXTEND or SACRED studies, with informed consent obtained for ongoing follow-up.

Why it matters

Potential benefit: If successful, the study could clarify whether hydroxyurea has lasting effects on growth, sexual development, fertility, and pregnancy, helping clinicians and families make better treatment choices.

How similar studies have gone: Hydroxyurea is well-established to reduce many sickle cell complications and improve survival, but large international data on long-term growth, puberty, fertility, and pregnancy are limited, so this focused observational effort addresses a gap rather than repeating well-settled findings.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients with documented sickle cell anemia (SCA).
* At least 8 years of age at the time of enrollment.
* Enrolled on the EXTEND or SACRED study.
* Provide informed consent.
* Able to take part in all parts of the study, including treatments, check-ups, and follow-up visits.

Exclusion Criteria:

* Currently taking part in another treatment study (not EXTEND or SACRED).
* Has received other treatments for sickle cell disease in the past 6 months.

Where it's running

  • Centro de Obstetricia y Ginecologia
    Santo Domingo, Dominican Republic
    Recruiting
  • Caribbean Institute for Health Research, University of West Indies
    Kingston, Jamaica
    Recruiting
  • Buganda Medical Centre
    Mwanza, Tanzania
    Recruiting

Study contacts

  • Principal investigator: Russell E Ware, MD, PhD — Children's Hospital Medical Center, Cincinnati
  • Study coordinator: Teresa Latham, DrPh
  • Email: Teresa.Latham@cchmc.org
  • Phone: 513-803-7822

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.