TY - GEN AU - Grobstein,C TI - Biological characteristics of the preembryo SN - 0077-8923 PY - 1989///0106 KW - Blastocyst KW - cytology KW - Embryo, Mammalian KW - physiology KW - Female KW - Humans KW - Morula KW - Zygote N1 - Publication Type: Journal Article UR - https://doi.org/10.1111/j.1749-6632.1988.tb22272.x ER -