Alfarawati et al did a cytogenetic analysis of human blastocysts and found that the majority of developmentally advanced blastocysts were male (3:1 ratio of male to female) . Dumoulin et al. found a clear sex related growth difference in a study on growth rate of human preimplantation surplus blastocysts .Read More →
Each nucleus undergoes two mitotic divisions and the mature embryo sac is 8 nucleated. The eight nuclei are organised into antipodals, egg apparatus and polar nuclei as in Polygonum type of embryo sac. What is the arrangement of nuclei in Polygonum type of embryo sac? B. In angiosperms (dicots), theRead More →
In the case of in vitro fertilization (IVF), the fertilized eggs or human blastocysts normally hatch out of their shell and start to implant about 1 or 2 days after the 5th day of the IVF blastocyst transfer. This means the implantation takes place about 7 to 8 days afterRead More →