1. Unsuspected early pregnancy at hysterosalpingography
Vincent H.W.M Jongen, M.D., James M.P Collins, M.D., Johan A Lubbers, M.D., Maria van Selm, M.D. 
Fertility and Sterility 
Volume 76, Issue 3, Pages (September 2001)
DOI: /S (01)

2. Figure 1
A hysterosalpingogram during the early filling phase reveals an intrauterine pregnancy after 11 weeks of gestation.Credit: Jongen. Unsuspected pregnancy at hysterosalpingography. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (01) )

3. Figure 2
A hysterosalpingogram during the maximal filling phase reveals a chorionic sac. (A), A chorion frondosum in right corner of the uterine cavity. (B), Amniotic and yolk sac. (C), Uterine cavity. Credit: Jongen. Unsuspected pregnancy at hysterosalpingography. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (01) )