midwife

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A person, usually a woman, who is trained to assist women in childbirth.
• noun One who assists in or takes a part in bringing about a result.
• transitive verb To assist in the birth of (a baby).
• transitive verb To assist in bringing forth or about.

from The Century Dictionary.

• noun A woman who assists women in childbirth.
• To perform the office of midwife.
• To assist in childbirth.
• To aid in bringing into being by acting the part of a midwife; assist in bringing to light.

from the GNU version of the Collaborative International Dictionary of English.

• noun A woman who assists other women in childbirth; a female practitioner of the obstetric art.
• transitive verb To assist in childbirth.
• intransitive verb To perform the office of midwife.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A person, usually a woman, who is trained to assist women in childbirth, but who is not a physician.
• noun rare, figuratively Someone who assists in bringing about some result or project.
• verb transitive To act as a midwife
• verb transitive, figuratively to facilitate the emergence of

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a woman skilled in aiding the delivery of babies