| Comparative longitudinal study of cervical length and induced shorteningchanges among singleton, twin, and triplet pregnancies |
Meath, A.J.;Ramsey, P.S.;Mulholland, T.A.;Rosenquist, R.G.;Lesnick, T.;Ramin, K.D.; |
American Journal of Obstetrics and Gynecology |
2005-05-01 |
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