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IUD insertion forces: effects of recent childbirth and lactation
1Department of Obstetrics and Gynaecology, University of the Witwatersrand, Johannesburg, Republic of South Africa.
Advances in Contraception : the Official Journal of the Society for the Advancement of Contraception
|June 1, 1988
Summary
Breastfeeding women who recently delivered required less force to insert an intrauterine device (IUD). This suggests reduced insertion pain, likely due to physiological changes post-childbirth and lactation.
Area of Science:
- Reproductive Health
- Gynecology
- Obstetrics
Background:
- Intrauterine devices (IUDs) are a common form of long-acting reversible contraception.
- Insertion force for IUDs can be a factor in patient discomfort and procedural outcomes.
- Physiological changes during postpartum and lactation may influence cervical and uterine properties.
Purpose of the Study:
- To compare the force required for IUD insertion in breastfeeding, recently-delivered women versus non-breastfeeding controls.
- To investigate the potential impact of recent childbirth and lactation on IUD insertion mechanics.
Main Methods:
- A comparative study involving 28 breastfeeding, recently-delivered women and 28 matched controls.
- Matching criteria included age, parity, and IUD type.
- Measurement of the force (in Newtons) required for IUD insertion.
Main Results:
- The mean IUD insertion force was significantly lower in the breastfeeding, recently-delivered group (1.75 N) compared to controls (2.80 N).
- The difference in insertion force was statistically highly significant (p < 0.01).
Conclusions:
- Recent childbirth and lactation are associated with a reduced force needed for IUD insertion.
- This reduction may contribute to decreased IUD-related insertion pain.
- The findings suggest potential physiological mechanisms influencing uterine properties during postpartum and lactation.