WASHINGTON, Dec. 27 -- Obstetrics and Gynecology, a journal from the American College of Obstetricians and Gynecologists, published research articles on the following topics in its January 2023 edition:

Contents:

* Meperidine Compared With Nitrous Oxide for Intrapartum Pain Relief in Multiparous Patients: A Randomized Controlled Trial

Reviews:

* No-Test Medication Abortion: A Systematic Review

* Incidence, Indications, Risk Facto . . .

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