NCT07169591

Postprandial Glucose Handing in Contraceptive and IUD Users

Exploring the Effect of Hormonal Contraceptives on Postprandial Glucose Handling in Young Healthy Females

• Status: Recruiting
• Phase: —
• Study type: Observational
• Enrollment: 54 (estimated)
• Sponsor: McMaster University · Academic / Other
• Sex: Female
• Age: 18 Years – 45 Years
• Healthy volunteers: Accepted

Summary

Goals: The long-term use of hormonal birth control has been shown to effect glucose handling, or blood sugar regulation, and potentially lead to insulin resistance which increases a person's risk for metabolic diseases such as type 2 diabetes. The goal of this study is to investigate how the body handles glucose, in three groups of young, healthy females: NAT (naturally cycling, or not using hormonal birth control), OCP (taking a birth control pill), and IUD (using an intrauterine device). Objectives: We will investigate if the body's ability to handle glucose differs between these groups. We will also explore if these differences are linked to the levels of primary sex hormones in females, estrogen and progesterone, and if the synthetic versions produced by hormonal birth control have the same negative effect. We will use an oral glucose tolerance test to investigate these potential differences, having participants drink a 75 gram glucose beverage and taking blood samples every 15-30 minutes for a 2-hour timespan. These blood samples will be used to measure glucose and insulin levels in the blood to determine any changes that occur in the body in response to glucose.

Detailed description

Insulin resistance is a common metabolic condition, and is considered a primary risk factor for the development of type 2 diabetes (T2D). As the prevalence of T2D continues to rise, particularly among premenopausal females (18-45 years), it is imperative to conduct additional research in this area. Fluctuations in primary sex hormones in females have been shown to modulate risk for developing impaired glucose tolerance, however, research in this area as well as work investigating synthetic versions of these hormones for OCP and IUD users remains unclear. It is crucial to investigate how hormonal contraceptives can alter glucose tolerance in young, otherwise healthy females, and what downstream effects contraceptives could have later in life.

Conditions

• Glucose Homeostasis

Interventions

Type	Name	Description
DIAGNOSTIC_TEST	Oral Glucose Tolerance test (75g 2-hour)	Standard oral glucose tolerance test with blood draws every 15-30 minutes for a 2-hour span

Timeline

• Start date: 2025-10-01
• Primary completion: 2026-07-01
• Completion: 2026-10-01
• First posted: 2025-09-12
• Last updated: 2025-09-22

Locations

1 site across 1 country: Canada