L ate last year, it became my friend’s favourite party trick. “Rosa’s going to have a baby next week,” she’d say to a group of people who didn’t know me. I’d watch their faces as they tried to inconspicuously scan my body, detecting no sign of a bump. “Congratulations!” they’d say, smiles tight, clearly wondering what other delusions I might have up my sleeve. I was , however, about to have a baby. At daybreak on a warm October day, our beautiful, 6lb 10oz, 19.5in‑long baby girl was born; skin pink and taut, scream wet and bright. I held my wife’s hand and head as our daughter emerged from her body – a daughter who had initially come from me. We did what is known as reciprocal IVF: a route to parenthood that is increasingly being used by queer people. First, we each made embryos by retrieving our eggs and having them fertilised with donor sperm. With “normal” IVF , the embryo, if you’re lucky enough to have made one, returns to the body that made the eggs.…