Multiple births from fertility treatment in the UK: a consensus statement.
Association of Clinical Embryologists; Bliss; British Fertility Society; British Infertility Counselling Association; Donor Conception Network; Endometriosis UK; Fertility Friends; Human Fertilisation and Embryology Authority; Infertility Network UK; Miscarriage Association; Multiple Births Foundation; National Gamete Donation Trust; National Perinatal Epidemiology Unit; Royal College of Nursing; Royal College of Obstetricians and Gynaecologists; Royal College of Paediatrics and Child Health; Surrogacy UK.