Cervical pregnancy in assisted reproduction: an analysis of risk factors in 91,067 ongoing pregnancies

1. Matorras, R.
2. Zallo, A.
3. Hernandez-Pailos, R.
4. Ferrando, M.
5. Quintana, F.
6. Remohi, J.
7. Malaina, I.
8. Laínz, L.
9. Exposito, A.