Summera Alsam, Yasmin Rashid.
A comparative study between mono chorionic and dichorionic twins to assess the perinatal outcome.
Pak J Med Health Sci Jan ;4(4):484-8.

Objective: To establish the incidence of twin pregnancy and assess the perinatal outcome in monochorionic and dichorionic twins. Study design: Prospective study Place and duration: This study was carried out at Sir Ganga Ram hospital Lahore during a period of one year from 1st June 2000 to 31st May 2001. Subjects and methods: Total number of deliveries and all cases of twin pregnancies presenting at first and second trimester to Labor room No.2 (obstetrics unit 2 and 3) during one year were included in the study. A special Performa was designed and details of each case including maternal history, clinical exam, ultrasound findings regarding chorionicity, mode of delivery, perinatal outcome and any maternal complications were recorded. Results: The incidence of twin pregnancy in our study came out to be 9.71 per 1000 live births. 31 (44.29%) patients had monochorionic twins whereas 39 (55.71%) patients had dichorionic twins. Perinatal outcome was slightly better in dichorionic group but parameters like maternal age, parity, mode of delivery of twins, maternal presentation and complications like PIH and preterm labor were similar in two groups. Conclusions: Twin pregnancy provides the obstetrician with the challenge of increased risk to the mother and increased fetal morbidity and mortality. Monochorionic twins are at more risk to develop various complications. Chorionicity should be determined on ultrasound in all twins preferably in first trimester. Early diagnosis of the twin pregnancy and proper follow up throughout the pregnancy improves the perinatal out come.

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