Reproduction study

[Pajarita]

Scientists at the Max Planck Institute for Ornithology tracked 23,000 eggs and found that infertility is usually the father's problem while high embryo mortality is the mother's but I doubt this study was done correctly because they mention that zebra finches breed all year round (wrong!!!) and the way they determined the father's infertility problem was switching pairs - which is not what one would call a very scientific method taking into consideration that females determine if the eggs will be fertilized or not so a clear egg does not necessarily has to mean that the father is infertile, it could easily mean that the female decided she did not want babies under the conditions.

https://phys.org/news/2020-09-problems- ... birds.html