Source:http://linkedlifedata.com/resource/umls/id/C0600457
MSH: The number of pregnancies, complete or incomplete, experienced by a female. It is different from PARITY, which is the number of offspring borne. (From Stedman, 26th ed),NCI: To be pregnant. When followed by a numeral, the term indicates how many times a woman has been pregnant, regardless of the outcome of the pregnancy.