Connect with us

Motherhood

Blood pressure patterns during pregnancy predict later hypertension risk

Published

on

Women with blood pressure levels in a range considered clinically normal during pregnancy but no mid-pregnancy drop in blood pressure face an increased risk of developing hypertension in the five years after giving birth, a new study shows.

These women, about 12 per cent of the population studied, would not be flagged as high-risk by current medical guidelines, but the new findings could help identify them as candidates for early intervention.

Researchers collected data on blood pressure and other health factors from 854 women during pregnancy and up to five years postpartum. That longitudinal approach allowed them to map the trajectory of women’s blood pressure throughout pregnancy and to spot a link between specific blood pressure patterns and hypertension several years later.

For most women in the study (80.2 per cent), systolic blood pressure remained low throughout pregnancy. In 7.4 per cent of women, blood pressure started out high, dropped during the second trimester, then increased again.

 

A third group of women (12.4 per cent) had slightly elevated systolic blood pressure that remained at a healthy level throughout pregnancy, but did not drop during the second trimester. Compared to the first group, these women faced a 4.91 times higher risk of hypertension in the five years after giving birth.

“This group of women would not be identified as having higher long-term hypertension risk by any of the current clinical criteria, since their blood pressure remained below diagnostic thresholds and most did not have other traditional risk factors,” said Shohreh Farzan, associate professor of population and public health sciences at the Keck School of Medicine of USC and the study’s senior author.

The findings suggest that tracking blood pressure patterns during pregnancy could help identify this underrecognised group and plan interventions that may prevent cardiovascular disease, said the study’s first author, Zhongzheng (Jason) Niu, a Presidential Sustainability Solutions Fellow at USC and an assistant professor of epidemiology and environmental health at the University at Buffalo.

Data for the study came from the Maternal and Developmental Risks from Environmental and Social Stressors (MADRES) cohort, a group of 854 low-income Hispanic women and their children who Keck School of Medicine researchers have worked with since 2015.

Researchers collected data on demographics, lifestyle factors and various health indicators periodically during pregnancy and at annual visits up to five years postpartum.

After collecting the data, researchers used a statistical approach known as latent class growth modeling to search for patterns in women’s blood pressure over the course of their pregnancies and to determine whether these patterns were associated with changes in their health at later visits.

They found three distinct patterns of systolic blood pressure during pregnancy: 80.2 per cent of women had consistently low blood pressure; 7.4 per cent of women had high blood pressure that dropped during the second trimester; and 12.4 per cent of women had slightly elevated blood pressure with no mid-pregnancy dip.

The group with high blood pressure and a mid-pregnancy dip had classic high-risk pregnancies, including more cases of preeclampsia and gestational hypertension than the other two groups. They also faced a 5.44 times higher risk of hypertension in the five years after giving birth, compared to the lowest-blood pressure group.

The 12.4 per cent of women with slightly elevated blood pressure but no mid-pregnancy dip faced a nearly equivalent risk of later hypertension — 4.91 times that of the lowest-blood pressure group.

“But because these women lacked traditional risk factors, they would not be alerted to their higher risk, nor would they be closely monitored for the development of high blood pressure,” Farzan said.

“Women’s health can change a lot between pregnancy and menopause, but it’s a period we know very little about,” Niu said.

“Our study helps fill that gap in understanding when it comes to hypertension.”

Simple changes in clinical practice can help identify and treat this high-risk group, Niu said. Clinicians can map blood pressure throughout pregnancy and follow up with women who lack a second-trimester dip, even if their readings stay within the normal range. The AHA, which updated hypertension cutoffs for the general population in 2017, may also consider adjusting its guidelines for blood pressure during pregnancy.

Additional studies are needed to replicate the findings and to learn more about women in both at-risk groups. Farzan, Niu and their colleagues are also exploring whether environmental exposures, including air pollution, heavy metals, and per- and polyfluoroalkyl substances (PFAS)—are linked to changes in blood pressure patterns during and after pregnancy.

Motherhood

Natural birth pressure harming new mothers’ mental health, research finds

Published

on

Pressure to have a natural birth can cause lasting psychological harm when labour does not go to plan, new research shows.

The study found that the messages women receive during pregnancy are directly linked to the shame and self-blame many feel when those expectations are not met.

For the first time, the research provides an explanation for why unmet birth expectations contribute to psychological harm.

Several women involved in the research said they felt they had not given birth “properly”, even when medical intervention had saved their lives.

Rebecca Matthews, lead author and PhD researcher at the University of Reading, said: “These women were not failed by their bodies, they were failed by the messages they were given.

“Birth trauma does not begin with birth. It begins in the ideology sold to women throughout pregnancy.

“For the first time we can explain precisely how, by showing how birth culture creates a moral standard for women that defines what a good mother does and then leaves them to blame themselves when birth does not match that.

“Until we reform the way we prepare women for birth, we will keep seeing the same devastating consequences for mothers and their babies.”

The researchers interviewed 21 first-time mothers in the UK whose births did not go as planned.

From NCT and hypnobirthing classes, to social media to midwives, the researchers heard how women are surrounded by messaging that frames natural, unmedicated vaginal birth as the “gold standard”, not just medically preferable, but as a mark of being a good mother and the first test of maternal worth.

Research shows around half of women report their birth differed significantly from their expectations, and for the women in this study, all of whom experienced exactly that, the psychological consequences were profound.

Women judged themselves against the internalised moral standard that this ideology had created.

The researchers are calling for antenatal education to stop treating one kind of birth as the goal and to present all birth outcomes as equally valid routes to motherhood.

They also call for better postnatal screening for women whose births did not go as expected, specifically targeting the shame, self-blame and identity disruption that this research identifies as mechanisms underlying birth trauma.

The findings align with and extend the conclusions of the Kirkup, Ockenden and Birth Trauma Inquiry reports, all of which documented how the institutional pursuit of “normal birth” contributed to preventable harm.

This research provides the first theoretical explanation of how that ideology generates individual psychological harm and points to antenatal messaging as the primary site of such preventable harm.

Continue Reading

Pregnancy

Wales becomes first UK nation to unite maternity care under a single digital record

Published

on

System C has completed the national rollout of BadgerNet Maternity across all seven NHS Health Boards in Wales. This is the first time any UK nation has unified its maternity care under a single digital record and patient-facing app.

With approximately 26,000 babies born annually in Wales, BadgerNet connects maternity information across organisational boundaries in the country.

Expectant parents can access their records, maternity appointments and key updates digitally through a single app, wherever they receive care while clinicians have secure access to the right information at the point of care.

The national three-year agreement across all Heath Boards replaces a patchwork of separate local systems and eliminates the need for paper hand-held notes.

Anthony Tracey is director of digital at Hywel Dda University Health Board, the final of the Welsh Health Boards to go live with BadgerNet.

He said: “The rollout of BadgerNet across Wales is a vitally important step forward in modernising our maternity services and providing a consistent service across the country.

“By giving expectant parents direct access to their information and enabling clinicians to share data more effectively, we are strengthening safety, transparency and consistency in maternity care nationwide.”

For expectant parents, the single digital maternity record transforms how they engage with their care.

Instead of carrying paper notes and repeating information at every appointment, parents can access key details, appointments and updates digitally, supporting more informed conversations and shared decision-making.

The result is greater transparency, fewer administrative frustrations and a more joined-up experience throughout pregnancy and into the postnatal period, regardless of which health board they fall under.

For clinicians and Health Boards, the joined-up approach reduces duplication and streamlines handovers across teams and sites. Information is digitally captured once and made available securely wherever it is needed, helping to minimise errors, reduce time spent tracking down notes and support more efficient multidisciplinary working.

At a national level, linking maternity data across Wales creates a foundation for safer, more consistent care.

Aggregated, standardised information enables earlier identification of trends and variation, supports evidence-based policy decisions and enhances long-term service planning.

With a comprehensive view of maternity activity and outcomes across the country, Wales is now better positioned to raise standards for parents, babies and families.

Guy Lucchi, managing director of healthcare at System C, added: “Delivering a truly national approach across all seven Health Boards is a significant achievement for Wales.

“One shared system means information flows with the patient, not the organisation.

“That reduces duplication, supports earlier identification of risk and frees up valuable clinical time.

“Crucially, linking maternity data at a national level provides powerful insight to drive improvement. Health Boards can benchmark, plan services with greater confidence and ensure resources are targeted where they are needed most, while expectant parents benefit from clearer communication and a more connected experience of care.”

Continue Reading

Pregnancy

Early birth safer in high blood pressure pregnancies – study

Published

on

Early birth may cut serious complications and stillbirth risk in high blood pressure pregnancies without increasing caesarean rates, a Cochrane review suggests.

Planned early birth after 34 weeks cut serious maternal complications by nearly half compared with watchful waiting, the findings suggest.

It also likely reduced the risk of stillbirth by about 75 per cent, although the authors said this should be interpreted with caution.

Catherine Cluver, senior author of the review and researcher at Stellenbosch University and Tygerberg Hospital, said: “These findings give clinicians and women clearer guidance about the timing of birth when high blood pressure develops in pregnancy.

“For women with pre-eclampsia in particular, the evidence supports offering planned early birth from 34 weeks, and no later than 37 weeks.”

This Cochrane review, led by King’s College London, pooled data from six randomised controlled trials involving 3,491 women.

The trials compared planned early birth after 34 weeks with watchful waiting in women with one or more hypertensive disorders of pregnancy.

Hypertensive disorders of pregnancy, including pre-eclampsia, gestational hypertension and chronic hypertension, are the second leading cause of maternal death globally.

For women with pre-eclampsia, early birth remains the only definitive treatment, as the condition is driven by the placenta and will only resolve once it is delivered.

The trials took place in the Netherlands, UK, US, India and Zambia.

The review found high-certainty evidence that serious maternal complications were nearly halved in women who had planned early birth compared with those managed with watchful waiting.

The finding on stillbirth was based on moderate-certainty evidence and was driven by a single trial in India and Zambia, where stillbirth rates are higher. No stillbirths were recorded in the high-income country trials.

The review also found that planned early birth likely does not increase neonatal unit admission, although this finding was also based on moderate-certainty evidence.

The authors said the maternal benefit held across both high- and low-income settings, suggesting early birth reduces complications even when women are already receiving appropriate monitoring and care.

Alice Beardmore-Gray, lead author of the review and obstetrician at King’s College London, said: “Judging when to offer birth is the question that we battle with clinically every day.”

The authors added that in two of the trials, more than half the women allocated to watchful waiting ended up needing emergency birth before 37 weeks.

They typically gave birth just three to five days later than women allocated to planned early birth and often experienced more complications.

Beardmore-Gray said: “A common misconception is that by waiting longer, mum and baby are gaining more time, but often what you are doing is just delaying an inevitable emergency birth, when both may be in a worse condition.”

The review found high-certainty evidence of no increased risk of caesarean section associated with planned early birth.

Beardmore-Gray said: “That is the first question anyone asks when you offer them an early induction: won’t it increase my risk of a C-section?

“Being able to clearly answer no is a really important piece of information to give women when counselling them about the timing of their birth.”

The authors said the timing of birth should take into account the woman’s preferences and the severity of her condition.

They said these findings are consistent with and reinforce current international guidelines, which recommend that all women with pre-eclampsia should be offered planned early birth no later than 37 weeks.

Women with gestational hypertension or chronic hypertension without severe features may choose to continue with careful monitoring, with planned early birth considered from 39 weeks onwards.

Further research is needed on longer-term outcomes for infants born late preterm and on the long-term cardiovascular health of mothers affected by hypertensive disorders of pregnancy.

Continue Reading

Trending

Copyright © 2025 Aspect Health Media Ltd. All Rights Reserved.