Mice were treated with low dose of the molecule NAD (nicotinamide adenine dinucleotide) and the ‘precursor’ as NMN (nicotinamide mononucleotide) in their drinking water over four weeks, resulting in dramatically restoring egg quality and increasing live births during a breeding trial.
https://www.technologynetworks.com/cell-science/news/reproductive-aging-process-reversed-in-mice