Where do the nutrients used by zygote between fertilization and implantation come from?

After fertilization, the zygote begins to undergo rapid cell division as it travels through the fallopian tube towards the uterus. During this period, the zygote obtains its nutrients from the surrounding fallopian tube fluid. This fluid contains various nutrients, including glucose, amino acids, and ions, which are essential for sustaining the early development of the embryo. Additionally, the zygote may also derive some nutrients from the remnants of the corona radiata and zona pellucida, which are protective layers surrounding the egg during ovulation. However, once the zygote reaches the uterus and undergoes implantation, it begins to receive nutrients primarily from the endometrial lining of the uterus through a process known as decidualization.