3 doctors weighed in:
How does the sperm and ovum fuse?
3 doctors weighed in

Dr. Nikolaos Zacharias
Obstetrics & Gynecology - Maternal Fetal Medicine
2 doctors agree
In brief: Chemically/hormonaly
A biochemical reaction occurs when the first sperm reaches the zona pellucida of the ovum that prohibits other sperm from entering.
That first sperm subsequently sheds its cover and its dna is expanded inside the ovum so that the combination of the two haploid dnas can take place and create a brand new dna identity!

In brief: Chemically/hormonaly
A biochemical reaction occurs when the first sperm reaches the zona pellucida of the ovum that prohibits other sperm from entering.
That first sperm subsequently sheds its cover and its dna is expanded inside the ovum so that the combination of the two haploid dnas can take place and create a brand new dna identity!
Dr. Nikolaos Zacharias
Dr. Nikolaos Zacharias
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