According to the study, parents regret having children. The more children a young couple has, the more dissatisfied they become.
Young parents become more dissatisfied with each additional child. As parents get older, their happiness in life exceeds that of those without children. Having a child over the age of 40 is no longer a problem or a long-term investment in happiness, according to the Max Planck Institute for Demographic Research (MPIDR) There is a trend that for parents under 30, the level of happiness decreases with each subsequent child, while the level for parents over 30 increases again.