Things Nobody Tells You About Becoming a Parent, According to Science

Birth prep guides do a good job covering sleep, feeding, car seat installs, and basic newborn care. They talk much less about what actually surprises new parents once the baby is home, whether you are becoming a mom or a dad: a relationship under strain, constant self-doubt, a flood of unsolicited advice, and a grief that is hard to name. Nobody warned us how much of parenthood is an emotional rollercoaster rather than the instant, uncomplicated fall in love we were promised. Here is the fuller truth about what to expect, the responsibility and the realities science actually backs, the things no one really tells you before you become a parent.

Your relationship is going through a crisis too, not just the baby

Relationship satisfaction drops measurably on average during the first year after a birth, for both partners. This is not a sign that the relationship is failing or that the baby is a problem, it is a well-documented and widely shared transition.

A meta-analysis of 49 studies confirms this decline between pregnancy and 12 months postpartum, followed by a more moderate drop between 12 and 24 months (Bogdan, Turliuc & Candel, 2022). Sleep deprivation, logistical load, and the temporary disappearance of couple time explain much of this decline, more than the baby itself. Very few couples actually separate over this alone: most regain a better balance once the peak fatigue of the early months has passed. Naming this phase together, rather than living it silently while thinking "this shouldn’t be happening," helps couples get through it without drawing the wrong conclusions about the relationship.

You will doubt yourself, even when doing everything "right"

Constant self-doubt about one’s parenting skills is not reserved for parents who are getting things wrong, it affects massively those who are doing everything correctly. This doubt reflects the intensity of the period, not real incompetence.

A study of mothers with newborns aged 0 to 1 month shows that parenting stress is linked to lower confidence in one’s own competence, regardless of the actual quality of care given to the baby (Tognasso et al., 2022). In other words, feeling unsure of yourself during this first month is the statistical norm, not the exception, and this feeling generally fades with accumulated day-to-day experience rather than a sudden "click."

Unsolicited advice will pour in, and it weighs more than we admit

No one can fully prepare you for how many opinions people will have once your new baby arrives, and almost everyone around you will offer one on how to raise your baby, often without being asked. This flood of advice, sometimes contradictory or outdated, adds a real mental load at a time when available energy is already limited.

Most of it comes from well-meaning people who genuinely want to help, but much of this advice is rooted in practices from a previous generation (sleeping on the stomach, sugar water in the bottle, always letting the baby cry it out) that current guidelines have since revised. Gently reminding people that recommendations have evolved defuses much of the tension without questioning their good intentions. Setting a simple, polite boundary, "we prefer to do it this way for now," protects the couple’s energy without having to justify every choice in detail.

Nobody tells you either that real support exists, often overlooked by new parents: a pediatrician for feeding and health questions, a lactation consultant or midwife for the early days, and local parent support groups for the isolation that often comes with a newborn. Many new parents discover these resources late, even though they are available from the moment the baby arrives.

You will quietly grieve your old life

Becoming a parent brings an identity shift, sometimes called matrescence, that comes with a sense of loss, not only gain. Missing certain parts of your old life (sleep, freedom, time for yourself) does not mean regretting becoming a parent, the two feelings coexist without contradicting each other.

A pilot study on matrescence, the identity shift into motherhood, describes it as touching every dimension of a new mother’s life and family life, with effects that are easier to live through when named in advance rather than discovered in silence and mistaken for a personal failing (Trinko, Sarewitz & Athan, 2025). This is different from the baby blues or postpartum depression, which involve a persistent low mood or hopelessness and deserve a conversation with a doctor or a lactation nurse, not just time. This new parental role, for the mother as much as for the one becoming a father, comes with new responsibilities that reshape part of each partner’s identity.

Time warps: endless days, months that fly by

Days structured by short, repetitive cycles (feeds, diaper changes, wake-ups) and nights broken up by sleep deprivation feel endless in the moment, lacking the usual markers that normally structure an adult’s day. Conversely, the weeks and months of early childhood fly by, because each new developmental milestone quickly overshadows the memory of the last one.

This contrast in time perception, widely reported by new parents, is nothing unusual: it simply reflects the absence of stable time markers (no work schedule, no regular sleep, no recognizable weekends) combined with genuinely rapid changes in the baby during the first months. Keeping a simple journal or a few dated photos helps many parents reclaim a sense of the time that seems to be slipping away.

The mental load is invisible, but it is exhausting

Anticipating the baby’s needs, remembering the last diaper change, tracking the next wake-up: this constant vigilance is invisible from the outside, but it is exhausting, sometimes more than the physical tasks, and it is arguably one of the hardest parts of early parenting for mental health. Lack of sleep and hormone shifts make it harder still, and it still falls disproportionately on one parent today, most often the mother, even when childcare is meant to be shared.

Relying on objective cues rather than constant mental vigilance helps lift part of this invisible load without giving up on the baby’s safety, and helps preserve the attachment and availability that matter most day to day, as detailed in our guide to secure attachment in babies. Our piece on the first month with a newborn covers the baby-care side of this same transition.

Important: Mothair is a wellness tracking device for infants. It is not a medical device under EU Regulation 2017/745 (MDR) and never replaces professional medical or psychological care. The information in this article comes from public scientific sources and does not constitute medical advice, consult a healthcare professional for any question about your well-being or your child’s.

FAQ

Is it normal for my relationship to go through a rough patch after having a baby?

Yes. A meta-analysis of 49 studies shows that relationship satisfaction declines significantly between pregnancy and 12 months postpartum, for both partners (Bogdan, Turliuc & Candel, 2022). This is not a sign the relationship is failing, it is a well-documented transition that generally eases with time.

Why do I doubt myself so much even when I am doing everything right?

Among mothers of infants under one month old, parenting stress is linked to lower confidence in one’s own competence, regardless of the actual quality of care provided (Tognasso et al., 2022). This self-doubt does not reflect incompetence, but the normal intensity of this adjustment period.

How do I handle unsolicited advice from family without getting upset?

Gently reminding people that guidelines have evolved (sleep position, breastfeeding, carrying) defuses much of the tension without questioning their good intentions. Politely setting a boundary ("we prefer to do it this way for now") works better than debating the substance every time.

Is it bad to sometimes miss my old life?

No, it is a normal reaction to the identity shift of parenthood, sometimes called matrescence (Trinko, Sarewitz & Athan, 2025). Missing certain parts of your old life does not mean regretting becoming a parent, the two feelings can coexist.

Why does time feel both endless and impossibly fast?

Days structured by short, repetitive cycles (feeds, diaper changes, wake-ups) feel endless in the moment, lacking the usual markers of an adult day, while weeks and months fly by because each new developmental milestone quickly overshadows the memory of the last one. This contrast in time perception is very widely reported by new parents.

Key Takeaways

• Relationship satisfaction declines on average during the first year postpartum, for both partners: this is not a relationship failure, it is a documented phase (Bogdan, Turliuc & Candel, 2022).
• Self-doubt about parenting skills is the statistical norm among new parents, not a sign of incompetence (Tognasso et al., 2022).
• Unsolicited advice is often rooted in outdated practices: gently naming that guidelines have evolved defuses most tension.
• Quietly grieving your old life, as part of the matrescence identity shift, coexists with loving being a parent (Trinko, Sarewitz & Athan, 2025).
• Time warps (long days, months that fly by) and the invisible mental load are exhausting: naming them helps you get through them.
• Don’t worry if bonding with your new baby takes patience and time rather than happening instantly, that pattern often continues gently into the toddler years too.