This is what the scientifically uneducated believe.

https://www.researchgate.net/profile/Michael-Carroll-13/publication/325819473/figure/fig3/AS:638841203458049@1529323020423/Homunculus-as-described-by-Hartsoeker-Taken-from-the-Wellcome-Collection-https.png

Note that the embryo originates in the spermatozoan cell.