“…The first studies looked at small samples of IVF children and lacked appropriate comparison groups (Mushin, Barreda-Hanson, & Spensley, 1986;Yovich, Parry, French, & Grauaug, 1986). However, controlled studies using standardized measures later established that the cognitive development of IVF children is within the normal range (Brandes et al, 1992;Cederblad et al, 1996;Gibson, Ungerer, Leslie, Saunders, & Tennant, 1998;Raoul-Duval, Bertrand-Servais, LeturKonirsch, & Frydman, 1994;Ron-El et al, 1994).…”