Freebase(0.00 / 0 votes)Rate this definition: Ibid. Ibid. is the term used to provide an endnote or footnote citation or reference for a source that was cited in the preceding endnote or footnote. This is similar in meaning to idem, abbreviated Id., which is commonly used in legal citation. To find the ibid. source, one must look at the reference preceding it. Anagrams for ibid. Â»
Fertilization and Embryo Development. Following ovulation, the egg is capable of fertilization for only 12 to 24 hours. Contact between the egg and sperm is random. Once the egg arrives at a specific portion of the tube, called the ampullar-isthmic junction, it rests for another thirty hours. Fertilization â sperm union with the egg â occurs in this portion of the tube. The fertilized egg then begins a rapid descent to the uterus.
The egg is fertilized by the sperms within 24 hours. The fertilized egg travels down the tube, sits around in there for about 3 days then heads to the uterus floating around looking for a nice cushion, finds it, and implants about five days after it heads out of the tubes.ou ovulate once a month and the egg stays viable for 12-24 hours. If your trying to get pregnant, having sex before you ovulate makes conceiving more likely. Emily Â· 7 years ago. Thumbs up.