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Table 1 Current and target sample in each conception group

From: Do intrauterine or genetic influences explain the foetal origins of chronic disease? A novel experimental method for disentangling effects

  Current sample size Target sample size
Homologous IVF 378 300
Sperm donation 170 200
Embryo donation 31 50
Egg donation 146 200
Gestational Surrogacy 16 30