Umbra translates the daily weather where you are into gentle, evidence-based guidance for every stage — from trying to conceive, through pregnancy and birth, into the postpartum days.
Today · Budapest
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Your body — and your baby's — face different climate risks at every stage. We adapt the daily guidance accordingly.
Heat affects fertility windows, sperm quality and implantation.
Get today's guidance →Core temperature spikes are highest-risk in early organogenesis.
Get today's guidance →Dehydration risk rises as blood volume expands.
Get today's guidance →Heat is linked to preterm birth and low birthweight.
Get today's guidance →Labour, lactation onset and recovery all shift in heat.
Get today's guidance →Newborn thermoregulation is immature — small changes matter.
Get today's guidance →Bite-sized perinatal climate science — each one paired with what helps, not what to fear.
Each +1°C in weekly mean temperature is linked with about a 5% higher chance of preterm birth.
Heat stress nudges inflammatory signals that can ripen the cervix earlier than planned.
On hot weeks: aim for 2 cool-down breaks (shopping mall, library, shaded park) of 30–60 min, add a pinch of salt to your water and sip hourly, and keep the bedroom under 24°C at night.
Source · Chersich et al., BMJ 2020 — meta-analysis of 70 studies.
A pregnant body already runs ~0.5°C warmer at baseline — heatwaves stack on top of that.
Higher metabolic rate + extra blood volume means you feel a 30°C day more like 31°C.
Treat the forecast as +1°C for yourself. Pre-cool with a wrist or neck rinse before going out — it drops perceived heat fast.
Source · ACOG Committee Opinion 804, 2020.
Newborns can't sweat efficiently in the first weeks — gentle air movement helps more than ice.
Their sweat glands are immature, so evaporation (a moving breeze on bare skin) cools better than cold packs.
Use a fan aimed across the room (not at baby), dress in one light layer, and check the back of the neck — warm and dry is the goal.
Source · WHO Thermal protection of the newborn, 1997.
Losing just 2% of body weight in water can lower breast-milk volume the same day.
Milk is ~88% water; your body protects your circulation first, milk supply second.
Drink to thirst, not to a target. Add a pinch of salt + squeeze of lemon to one bottle a day so minerals stay balanced.
Source · WHO/UNICEF Breastfeeding guidance, 2023.
From 2026, the EU bans several UV filters from sunscreens — including 4-Methylbenzylidene Camphor, certain PFAS, and some benzophenones. Homosalate stays, but with restrictions.
These filters are linked to hormone disruption or environmental persistence — concerns amplified in pregnancy and for newborns.
Check your sunscreen's INCI list for '4-MBC', 'Benzophenone-3', PFAS ('perfluoro-') and homosalate above allowed limits. Prefer mineral filters (zinc oxide, titanium dioxide) while pregnant or breastfeeding.
Source · EU Commission Regulation 2022/1176 & SCCS opinions on UV filters.
Educational only — not a substitute for your midwife or doctor. Full citations on the Sources page.
Pick your stage and we'll mix general perinatal-climate questions with ones built for you — heat, pressure, hydration and the newborn window. The result reads today's forecast in your city against your stage, so the takeaways are yours, not generic.
Sources: Chersich et al. (BMJ 2020), ACOG Opinion 804, WHO Thermal Protection (1997), WHO/UNICEF Breastfeeding (2023). Full list on the Sources page.
Which stage are you in? We'll tailor the questions and the result.
Share your stage and location. We'll fold the day's heat, humidity and UV into clear, kind steps.
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