Ovo vegetarianism

[2] Ovo vegetarianism refers to a diet free from meat, fish, and dairy products or ingredients with the exception of eggs.

Concerns include the practice of keeping a cow constantly pregnant in order for her to lactate and the slaughter of unwanted male calves.

[4] This contrasts with the industrial practices surrounding egg-laying hens, which produce eggs for human consumption without being fertilized.

[5] Ethical concerns about the consumption of eggs arise from the practice of culling male chicks shortly after birth.

[5][6][7] Practices considered humane for chick culling include maceration and suffocation using carbon dioxide.