1. Superfetation after ovulation induction and intrauterine insemination performed during an unknown ectopic pregnancy 
Teresa Lantieri, Alberto Revelli, Pietro Gaglioti, Guido Menato, Gianluca Gennarelli, Luisa Delle Piane, Marco Massobrio 
Reproductive BioMedicine Online 
Volume 20, Issue 5, Pages (May 2010)
DOI: /j.rbmo
Copyright © 2010 Reproductive Healthcare Ltd. Terms and Conditions

2. Figure 1
Ultrasound picture of the intrauterine pregnancy and of the concomitant tubal pregnancy resulting from superfetation: (a) intrauterine pregnancy, with gestational sac (conceptional age about 2weeks); (b) tubal pregnancy, with yolk sac and live embryo (conceptional age about 6weeks).
Reproductive BioMedicine Online  , DOI: ( /j.rbmo )
Copyright © 2010 Reproductive Healthcare Ltd. Terms and Conditions