Scientific Source #20 – Peer-Reviewed Article
“Mammalian embryo development begins when the fertilizing sperm triggers a series of elevations in the oocyte’s intracellular free Ca(2+) concentration”20
20Machaty, Z., Signal transduction in mammalian oocytes during fertilization, Cell Tissue Res, 2016, 363(1):169-83, https://www.researchgate.net/publication/282732457_Signal_transduction_in_mammalian_oocytes_during_fertilization.