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Updated: Aug 11, 2026

Murine Ileocolic Bowel Resection with Primary Anastomosis
Published on: October 29, 2014
Dysmature infants in women with jejunoileal bypass
Insights
Pregnancy after jejunoileal bypass surgery can result in dysmature infants, especially if the mother
Area of Science:
- Bariatric surgery outcomes
- Maternal-fetal medicine
- Reproductive endocrinology
Background:
- Jejunoileal bypass (JIB) is a bariatric surgery procedure.
- Pregnancy following JIB presents unique challenges for maternal and fetal health.
Observation:
- Three cases of pregnancy post-JIB are presented.
- All reported cases resulted in the birth of dysmature infants.
Findings:
- Maternal weight stabilization is crucial for successful pregnancy outcomes after JIB.
- Serial biparietal diameter (BPD) measurements may be more effective than estriol levels in detecting intrauterine growth retardation.
- Delayed pregnancy until postoperative weight stabilization is advised.
Implications:
- Pregnancy management post-JIB requires intensive clinical, BPD, and estriol monitoring.
- Optimizing maternal health post-bariatric surgery is essential for fetal development.
- Further research into the long-term effects of JIB on pregnancy is warranted.
Abstract:
Three cases of pregnancy and birth after jejunoileal bypass operation are reported. All three patients gave birth to dysmature infants. Two of the infants were heavily dysmature. Their mothers had not stabilized their body weights postoperatively. Serial determinations of biparietaldiameter (BPD) seemed in these cases to reveal the intrauterine growth retardation better than did estriol measurements. This present study confirms the suggestion that pregnancy should be postponed until postoperative weight stabilization has been achieved. When pregnancy has occurred, intensive controls concerning clinical examinations, BPD and serum estriol measurements is recommended in addition to metabolic controls.
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