How zygote develops and when it attaches to uterus?

The zygote develops through a series of cell divisions called cleavage as it travels down the fallopian tube toward the uterus. This process typically takes about 3 to 5 days, during which the zygote transforms into a blastocyst. The blastocyst then attaches to the uterine lining, a process known as implantation, which usually occurs around 6 to 10 days after fertilization. This attachment is crucial for establishing pregnancy and allowing for further development.