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Biomedical subjects

M Zelnik

Publications and source records attributed to M Zelnik.

At least 19 recordsLinked to original sources
PubMed1985

Contraceptive method switching among American female adolescents, 1979.

Better knowledge about contraceptive use in adolescents is needed if pregnancy prevention is to be improved. Data from the 1979 National Survey of Young Women were used to examine method switching once contraceptive use had begun among 449 never-pregnant young women who reported premarital intercourse more than once. Bivariate chi2 tests and multivariate logit regression were used to examine factors related to switching in four analyses: overall switching; switching among those with one intercourse partner; and switching from nonmedical and medical methods separately. Frequency of intercourse and type of first method had an interactive effect on switching; length of exposure to switching, type of relationship, and reason for choosing the first method were also significant. These results suggest that providers and educators should consider the circumstances under which contraceptive methods are chosen and used by young women when counseling them as to what method may be best for them.

Adolescent↗
PubMedDate not supplied

Teenage pregnancy.

Explore the source record for details and available documents.

Adolescent↗
PubMedDate not supplied

Sex education and knowledge of pregnancy risk among U.S. teenage women.

Seven in 10 never-married U.S. women aged 15-19 have had a sex education course, almost all of them in school. Young black women are slightly more likely than whites to have had such a course. About half of all never-married teenagers have had courses which included some teaching about modern contraceptive methods; six in 10 have had some formal instruction about VD, and seven in 10 have had courses that included detailed instruction about the monthly menstrual cycle. Six in 10 of those who have had a course with information on the menstrual cycle claim to know the period of greatest pregnancy risk; but only one-third of those who have had such a course can in fact correctly identify the time when the risk of pregnancy is highest. Young white women are nearly two times more likely than blacks to identify the period of risk correctly. Knowledge of the period of risk is a particularly important issue in relation to teenage pregnancy, because many sexually active teenagers say that they do not use contraception because they believe they are protected from the risk of pregnancy by the time of month when they have intercourse. Among those who claim to know the period of greatest risk, a sex education course is the most common source of information for both blacks and whites, with home a distant second. Medical personnel and facilities convey information about pregnancy risk the most effectively, but they are the first source for only a tiny fraction of teenagers.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMedDate not supplied

Probabilities of intercourse and conception among U.S. teenage women, 1971 and 1976.

One in five U.S. females have had intercourse by age 16, and two-thirds, by age 19. Almost all the experience is premarital. One in 10 U.S. women get pregnant before age 17; one-quarter before they are 19, and eight in 10 of these pregnancies are premarital. More than one-third of those who are sexually active premaritally have a premarital pregnancy before they turn 19, one-quarter by the time they are 17.

Actuarial Analysis↗
PubMedDate not supplied

The risk of adolescent pregnancy in the first months of intercourse.

Because of early age at initiation of intercourse and associated nonuse of contraception, half of first premarital pregnancies to teens occur in the first six months after they begin coitus; one-fifth occur in the first month. Programs to prevent adolescent pregnancy will not succeed unless they reach young people before they begin sexual activity.

Actuarial Analysis↗