Morphine, meperidine (Demerol; Sanofi-Aventis, Bridgewater, NJ), and fentanyl are the opioids that have been studied the most in labor analgesia research. These opioids, as well as newer ...

In choosing a method of contraception, it is important that it not interfere with lactation or have negative effects on the infant. Nonhormonal methods of contraception, such as barrier methods or ...