Section 1. General issues; 1. From sex for reproduction to reproduction without sex Gian Carlo Di Renzo, Valentina Tosto, Valentina Tsibizova and Giuseppe Benagiano; 2. Sex in pregnancy: beyond reproduction David Gómez Sánchez, Carlos López Ramón y Cajal and María Luisa Morales Serrano; 3. Physiology of pregnancy as related to sex Silvia Barras Bermejo and Pablo Tobías González; 4. Does orgasm affect fetal well-being? Ayelet Dangot, Eliane Rozanes and Ariel Many; 5. Demographics of sexual behaviour in pregnancy Hanna R. Goldberg and Karthika Davarajan; 6. Sexual practices during pregnancy in different cultures Rachel Spitzer and Jenny Yang; 7. What do obstetric guidelines say? Vered B. Lamhot, Ola Gutzeit and Dana Vitner; 8. Using the internet to educate on sex and pregnancy: grading internet information Noa Gilad, Yariv Yogev and Michael Lavie; Section 2. Specific issues; 9. Sex and assisted reproductive technologies Crystal Chan and Trish Dinh; 10. The male partner's perspective Marcos Luján Galán; 11. Sex in the first trimester Kirsten M. Niles; 12. Sex in the second and third trimesters Rita Zlatkin and Hadar Rosen; 13. Sex with bleeding in the first trimester Hugo Madar, Aurélien Mattuizii, Hanane Bouchghoul and Loïc Sentilhes; 14. Sex with bleeding in the second and third trimester Hisham T. Nasief, Duaa M. Mohammed Bahkali and Lawrence W. Oppenheimer; 15. Short cervix and sex Yara Maia Villar de Carvalho, Francisco Marcelo Carvalho, Beatriz Maria Villar de Carvalho and Eduardo Borges da Fonseca; 16. Preterm birth and sex Julia Burd and Vincenzo Berghella; 17. Multiple pregnancies and sex Hayley Lipworth, Jon F. R. Barrett and Nir Melamed; 18. Special pregnancies and sex Evangelia Vlachodimitropoulou Koumoutsea and Cynthia Maxwell; 19. Air embolism related to sex in pregnancy and the postpartum Dina Mohamed, Mohamed Momtaz and Dan Farine; 20. Pelvic and ovarian masses during pregnancy Elisa Moreno Palacios and Pablo Tobías González; 21. Sexually transmitted infections and pregnancy Maria Serrano Velasco and Cristina González Benítez; 22. Sex for induction of labour Jazleen Dada and Stefania Ronzoni; 23. Nipple stimulation during pregnancy Doron Kabiri, Gali Gordon and Yossef Ezra; 24. Sex during postpartum: why the six-week break? E. Shirin Dason, Abi Kirubarajan and Mara Sobel; 25. Sex after pelvic floor injuries María del Mar Muñoz Muñiz, Sara Serrano Velayos and Ángeles Leal García; 26. Miscarriages, spontaneous abortions, stillbirths and sex Orli Silverberg and Dan Farine.