Despite the ever changing weather, I hear birds chirping outside. Beams of sunlight come and go, as do bees that are kept at the local elementary. The daffodils have not given in to the rain and the mosquitoes have not arrived yet. Perfect spring. New green life is piercing through frosty soil, and a somehow larger family of Easter bunnies gathers on our lawn. A good moment to think about how human families form and grow and pursue happiness. I have witnessed this lifecycle building best in my immediate friends, such as Beth (not her real name).

Beth has been married for over ten years now. She confided to me that her wellbeing had changed markedly since she first partnered with Jack. Getting married and moving in together nudged up her happiness. Trying for a child and getting pregnant brought an even deeper contentment and feeling of security, also for Jack. The actual birth of the first baby was life changing and laborious. But at the same time deeply rewarding and instilling pride. Beth and Jack felt like family. Both of them older than 36, they also saw a long held wish materialize, and at a time where their biological clock could have decided otherwise. In spite of the hard work that followed and would eat up part of their leisure for good, they were happy.

Mikko Myrskylä und Rachel Margolis mined the extensive data from British and German household panels and found that the birth of a child normally increases the parents’ happiness. This is strongest for the first child and a bit milder for the second (and non-positive for the third). The effect is temporarily very strong. As they write, “happiness is, on average, 0.3-0.5 units higher (on 0-10 scale) when a child is born compared to the baseline 4-5 years earlier. This magnitude is comparable to the effect of divorce (-0.49) or going to from employed to unemployed (-0.47).”

Happiness gets a boost around the birth of a child, with 2-3 years anticipation before the birth and lasting 1-2 years thereafter. The happiness increasing period before birth may reflect partnering, marriage and getting pregnant; and the post birth decline possibly a realization of the permanent loss of spare time.

And, wait for it. You better have your kids at a mature age. Older parents, above 35, as well as the highly educated have a stronger happiness surge, and even when happiness drops around 2 years after the birth, it still stays above the long term average. So for these groups, parenthood increases their happiness sustainably. Younger parents (below 25) can see their happiness decline long term. This may reflect that younger parents typically have fewer resources available, and also that they still have a – now unfulfilled – need to enjoy life and leisure on their own. Older parents likely have had their partying years and can let them go.

Looking at all this it is understandable that more and more people decide to have their children later, and to limit their number. Parenthood in the second springtime of life lets the new happiness last.