APA
Hester A. E., Ankumah N. E., Chauhan S. P., Blackwell S. C. & Sibai B. M. (20190320). Twin transvaginal cervical length at 16-20 weeks and prediction of preterm birth. : The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians.
Chicago
Hester Ashley E, Ankumah Nana-Ama E, Chauhan Suneet P, Blackwell Sean C and Sibai Baha M. 20190320. Twin transvaginal cervical length at 16-20 weeks and prediction of preterm birth. : The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians.
Harvard
Hester A. E., Ankumah N. E., Chauhan S. P., Blackwell S. C. and Sibai B. M. (20190320). Twin transvaginal cervical length at 16-20 weeks and prediction of preterm birth. : The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians.
MLA
Hester Ashley E, Ankumah Nana-Ama E, Chauhan Suneet P, Blackwell Sean C and Sibai Baha M. Twin transvaginal cervical length at 16-20 weeks and prediction of preterm birth. : The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians. 20190320.