After a day or so, these nascent embryos are carefully examined in an effort to distinguish between any that are defective and those that seem to be healthy and most likely to implant and develop.
या स्त्रीबीजांबरोबर पतीच्या शुक्रजंतूंचा संयोग प्रयोगशाळेत घडवून आणला जातो.