Sarah, 42, met Carl, 35, through a website called co-parents. The clinics protect male donors, too, regarding their identity, which is kept secret until any resulting child hits the age of For some, it amounts to a positive decision to remain single. It felt staged and undressing was very unsexy. They were not comfortable with NI and we only did it once. In reality, there was anything but romance on the cards. All the men offered to provide copies of STD checks but none of them asked if I had been tested. I stayed in their spare room. Traditionally, sperm donor sites link single women, lesbian or infertile couples with men willing to donate samples through artificial insemination. The first is from a donor in Amsterdam, willing to fly over if I foot the bill. She lives in a large Edwardian balcony flat in Brighton. Research has shown that middle-aged men are looking for partners who are far younger than them, examples include Michael Douglas, 66 and his wife Catherine Zeta Jones, 41 The typical year-old man will accept a woman up to 15 years younger, but no more than three years older — and the women he enters into online conversation with are almost always at the younger end of the spectrum. Never married, she has a son James, now 13, by a man she parted from before her son was born. All I ask is for regular updates and pictures. When she last registered with an online dating site she was 44 — and few men made contact. When he tries to avoid an initial coffee, pushing instead to meet in a hotel, I cancel for my own safety. After dinner with Carl, she took him home for sex, with the one and only intention of conceiving a child.