Reichman DE، Jackson KV، Racowsky C (مايو 2009). "Incidence and development of zygotes exhibiting abnormal pronuclear disposition after identification of two pronuclei at the fertilization check". Fertil. Steril. ج. 94 ع. 3: 965–970. DOI:10.1016/j.fertnstert.2009.04.018. PMID:19476942.
Reichman DE، Jackson KV، Racowsky C (مايو 2009). "Incidence and development of zygotes exhibiting abnormal pronuclear disposition after identification of two pronuclei at the fertilization check". Fertil. Steril. ج. 94 ع. 3: 965–970. DOI:10.1016/j.fertnstert.2009.04.018. PMID:19476942.