Publications 2025

Heitmann G, Meland K, Laine K, Flaathen EM, Leonardsen AL (2025)
Women´s experiences with being exposed to external aortic compression in the management of postpartum hemorrhage: a qualitative study in Norway
BMC Pregnancy Childbirth, 25 (1), 839
DOI 10.1186/s12884-025-07914-4, PubMed 40797234

Laine K, Fodstad K, Räisänen S (2025)
Obstetric anal sphincter injuries in spontaneous vaginal births in nulliparous pregnant individuals: a 21-year cohort study based on real-world data
Am J Obstet Gynecol (in press)
DOI 10.1016/j.ajog.2025.06.014, PubMed 40513930

Sugulle M, Laine K, Tingleff T, Murzakanova G, Räisänen S (2025)
Effects of fetal presentation on mode of delivery in 26 143 twin pregnancies: A nationwide, population-based observational study of 31-year real-world data
Int J Gynaecol Obstet (in press)
DOI 10.1002/ijgo.70103, PubMed 40156488

Publications 2024

de Leeuw JW, Laine K, Manresa M, Raisanen S, Kalis V, Rušavý Z, de Tayrac R (2024)
Delivering in or out of water, the OASI rates in the POOL cohort study are disturbingly high
BJOG (in press)
DOI 10.1111/1471-0528.17933, PubMed 39118197

Fodstad K, Laine K, Räisänen S (2024)
Obstetric anal sphincter injuries during instrumental vaginal delivery: An observational study based on 18-years of real-world data
BJOG, 131 (13), 1824-1831
DOI 10.1111/1471-0528.17914, PubMed 39030798

Fodstad K, Laine K, Räisänen S (2024)
Authors' reply
BJOG, 132 (1), 103-104
DOI 10.1111/1471-0528.17958, PubMed 39307935

Laine K, Räisänen S, Yli BM, Tingleff T (2024)
Comment on the study by Aanstad et al. "Intrapartum fetal monitoring practices in Norway: A population-based study"
Sex Reprod Healthc, 41, 101018
DOI 10.1016/j.srhc.2024.101018, PubMed 39191075

Murzakanova G, Räisänen S, Jacobsen AF, Yli BM, Tingleff T, Laine K (2024)
Clinical examination for identifying low-risk pregnancies suitable for expectant management beyond 40-41 gestational weeks: maternal and fetal outcomes
Arch Gynecol Obstet, 311 (4), 1007-1015
DOI 10.1007/s00404-024-07869-5, PubMed 39681758

Publications 2023

Laine K, Pay AD, Yli BM (2023)
Time trends in caesarean section rates and associations with perinatal and neonatal health: a population-based cohort study of 1 153 789 births in Norway
BMJ Open, 13 (2), e069562
DOI 10.1136/bmjopen-2022-069562, PubMed 36725101

Laine K, Tingleff T (2023)
[Sub-optimal prophylaxis for pre-eclampsia in twin pregnancies]
Tidsskr Nor Laegeforen, 143 (8)
DOI 10.4045/tidsskr.23.0331, PubMed 37254982

Murzakanova G, Räisänen S, Jacobsen AF, Yli BM, Tingleff T, Laine K (2023)
Trends in Term Intrapartum Stillbirth in Norway
JAMA Netw Open, 6 (9), e2334830
DOI 10.1001/jamanetworkopen.2023.34830, PubMed 37755831

Publications 2022

Kessler J, Yli BM, Overrein H, Laine K (2022)
[No reason to change the recommendations on fetal monitoring]
Tidsskr Nor Laegeforen, 142 (16)
DOI 10.4045/tidsskr.22.0662, PubMed 36345635

Sole KB, Staff AC, Räisänen S, Laine K (2022)
Substantial decrease in preeclampsia prevalence and risk over two decades: A population-based study of 1,153,227 deliveries in Norway
Pregnancy Hypertens, 28, 21-27
DOI 10.1016/j.preghy.2022.02.001, PubMed 35151209

Tingleff T, Räisänen S, Vikanes Å, Sandvik L, Sugulle M, Murzakanova G, Laine K (2022)
Different pathways for preterm birth between singleton and twin pregnancies: a population-based registry study of 481 176 nulliparous women
BJOG, 130 (4), 387-395
DOI 10.1111/1471-0528.17344, PubMed 36372962

Zimmo MW, Laine K, Hassan S, Bottcher B, Fosse E, Ali-Masri H, Zimmo K, Falk RS, Lieng M, Vikanes A (2022)
Exploring the impact of indication on variation in rates of intrapartum caesarean section in six Palestinian hospitals: a prospective cohort study
BMC Pregnancy Childbirth, 22 (1), 892
DOI 10.1186/s12884-022-05196-8, PubMed 36461037

Publications 2021

Laine K, Yli BM, Cole V, Schwarz C, Kwee A, Ayres-de-Campos D, Vayssiere C, Roth E, Gliozheni E, Savochkina Y, Ivanisevic M, Kalis V, Timonen S, Verspyck E, Anstaklis P, Beke A, Eriksen BH, Santo S, Kavsek G, Duvekot H, Dadak C (2021)
European guidelines on perinatal care- Peripartum care Episiotomy
J Matern Fetal Neonatal Med, 35 (25), 8797-8802
DOI 10.1080/14767058.2021.2005022, PubMed 34895000

Sole KB, Staff AC, Laine K (2021)
Maternal diseases and risk of hypertensive disorders of pregnancy across gestational age groups
Pregnancy Hypertens, 25, 25-33
DOI 10.1016/j.preghy.2021.05.004, PubMed 34022624

Tingleff T, Räisänen S, Vikanes Å, Sandvik L, Laine K (2021)
Association between maternal country of birth and preterm birth: A population-based register study of 910,752 deliveries
Scand J Public Health, 49 (8), 904-913
DOI 10.1177/1403494821992894, PubMed 33588641

Publications 2020

Laine K, Räisänen S (2020)
Effect of maternal country of birth on intrapartum epidural use - A population-based register study of 602 095 deliveries
Eur J Obstet Gynecol Reprod Biol, 250, 41-47
DOI 10.1016/j.ejogrb.2020.04.013, PubMed 32387891

Murzakanova G, Räisänen S, Jacobsen AF, Sole KB, Bjarkø L, Laine K (2020)
Adverse perinatal outcomes in 665,244 term and post-term deliveries-a Norwegian population-based study
Eur J Obstet Gynecol Reprod Biol, 247, 212-218
DOI 10.1016/j.ejogrb.2020.02.028, PubMed 32146227

Publications 2019

Hassan S, Laine K, Fosse E, Abu-Rmeileh NM, Ali-Masri HY, Zimmo M, Zimmo K, Vikanes Å, Ismail KM (2019)
Induction Of Labor Among Singleton Pregnancies In Six Palestinian Governmental Hospitals: A Population-Based Cohort Study
Int J Womens Health, 11, 597-605
DOI 10.2147/IJWH.S215781, PubMed 31807087

Laine K, Murzakanova G, Sole KB, Pay AD, Heradstveit S, Räisänen S (2019)
Prevalence and risk of pre-eclampsia and gestational hypertension in twin pregnancies: a population-based register study
BMJ Open, 9 (7), e029908
DOI 10.1136/bmjopen-2019-029908, PubMed 31278106

Publications 2018

Ali-Masri H, Hassan S, Fosse E, Zimmo KM, Zimmo M, Ismail KMK, Vikanes Å, Laine K (2018)
Impact of electronic and blended learning programs for manual perineal support on incidence of obstetric anal sphincter injuries: a prospective interventional study
BMC Med Educ, 18 (1), 258
DOI 10.1186/s12909-018-1363-3, PubMed 30419884

Ali-Masri H, Hassan S, Ismail K, Zimmo K, Zimmo M, Fosse E, Vikanes Å, Laine K (2018)
Enhancing recognition of obstetric anal sphincter injuries in six maternity units in Palestine: an interventional quality improvement study
BMJ Open, 8 (6), e020983
DOI 10.1136/bmjopen-2017-020983, PubMed 29921684

Ali-Masri HY, Hassan SJ, Zimmo KM, Zimmo MW, Ismail KMK, Fosse E, Alsalman H, Vikanes Å, Laine K (2018)
Evaluation of Accuracy of Episiotomy Incision in a Governmental Maternity Unit in Palestine: An Observational Study
Obstet Gynecol Int, 2018, 6345497
DOI 10.1155/2018/6345497, PubMed 30510580

Sole KB, Staff AC, Laine K (2018)
The association of maternal country of birth and education with hypertensive disorders of pregnancy: A population-based study of 960 516 deliveries in Norway
Acta Obstet Gynecol Scand, 97 (10), 1237-1247
DOI 10.1111/aogs.13393, PubMed 29873810

Zimmo K, Laine K, Fosse E, Zimmo M, Ali-Masri H, Zucknick M, Vikanes Å, Hassan S (2018)
Episiotomy practice in six Palestinian hospitals: a population-based cohort study among singleton vaginal births
BMJ Open, 8 (7), e021629
DOI 10.1136/bmjopen-2018-021629, PubMed 30012790

Zimmo KM, Laine K, Fosse E, Zimmo M, Ali-Masri H, Böttcher B, Zucknick M, Vikanes Å, Hassan S (2018)
Impact of animated instruction on tablets and hands-on training in applying bimanual perineal support on episiotomy rates: an intervention study
Int Urogynecol J, 30 (8), 1343-1350
DOI 10.1007/s00192-018-3711-6, PubMed 30008080

Zimmo M, Laine K, Hassan S, Fosse E, Lieng M, Ali-Masri H, Zimmo K, Anti M, Bottcher B, Sørum Falk R, Vikanes Å (2018)
Differences in rates and odds for emergency caesarean section in six Palestinian hospitals: a population-based birth cohort study
BMJ Open, 8 (3), e019509
DOI 10.1136/bmjopen-2017-019509, PubMed 29500211

Zimmo MW, Laine K, Hassan S, Bottcher B, Fosse E, Ali-Masri H, Zimmo K, Sørum Falk R, Lieng M, Vikanes Å (2018)
Caesarean section in Palestine using the Robson Ten Group Classification System: a population-based birth cohort study
BMJ Open, 8 (10), e022875
DOI 10.1136/bmjopen-2018-022875, PubMed 30361403

Publications 2017

Ali HY, Vikanes Å, Anti M, Hassan S, Ismail KM, Zimmo K, Zimmo M, Fosse E, Laine K (2017)
Evaluation of an animated instructional video as a training tool for manual perineum support during vaginal delivery
Int J Gynaecol Obstet, 137 (2), 213-219
DOI 10.1002/ijgo.12115, PubMed 28171679

Hassan S, Vikanes A, Laine K, Zimmo K, Zimmo M, Bjertness E, Fosse E (2017)
Building a research registry for studying birth complications and outcomes in six Palestinian governmental hospitals
BMC Pregnancy Childbirth, 17 (1), 112
DOI 10.1186/s12884-017-1296-6, PubMed 28399841

Jansova M, Kalis V, Rusavy Z, Räisänen S, Lobovsky L, Laine K (2017)
Fetal head size and effect of manual perineal protection
PLoS One, 12 (12), e0189842
DOI 10.1371/journal.pone.0189842, PubMed 29287104

Pettersen-Dahl A, Murzakanova G, Sandvik L, Laine K (2017)
Maternal body mass index as a predictor for delivery method
Acta Obstet Gynecol Scand, 97 (2), 212-218
DOI 10.1111/aogs.13265, PubMed 29164597

Räisänen S, Hogue CJR, Laine K, Kramer MR, Gissler M, Heinonen S (2017)
A population-based study of the effect of pregnancy history on risk of stillbirth
Int J Gynaecol Obstet, 140 (1), 73-80
DOI 10.1002/ijgo.12342, PubMed 28990188

Zimmo K, Laine K, Vikanes Å, Fosse E, Zimmo M, Ali H, Thakar R, Sultan AH, Hassan S (2017)
Diagnosis and repair of perineal injuries: knowledge before and after expert training-a multicentre observational study among Palestinian physicians and midwives
BMJ Open, 7 (4), e014183
DOI 10.1136/bmjopen-2016-014183, PubMed 28389490

Publications 2016

Fodstad K, Staff AC, Laine K (2016)
Episiotomy preferences, indication, and classification--a survey among Nordic doctors
Acta Obstet Gynecol Scand, 95 (5), 587-95
DOI 10.1111/aogs.12856, PubMed 26814151

Fodstad K, Staff AC, Laine K (2016)
Sexual activity and dyspareunia the first year postpartum in relation to degree of perineal trauma
Int Urogynecol J, 27 (10), 1513-23
DOI 10.1007/s00192-016-3015-7, PubMed 27185318

Publications 2014

Fodstad K, Staff AC, Laine K (2014)
Effect of different episiotomy techniques on perineal pain and sexual activity 3 months after delivery
Int Urogynecol J, 25 (12), 1629-37
DOI 10.1007/s00192-014-2401-2, PubMed 24807426

Räisänen S, Selander T, Cartwright R, Gissler M, Kramer MR, Laine K, Heinonen S (2014)
The association of episiotomy with obstetric anal sphincter injury--a population based matched cohort study
PLoS One, 9 (9), e107053
DOI 10.1371/journal.pone.0107053, PubMed 25203655

Publications 2013

Jansova M, Kalis V, Rusavy Z, Zemcik R, Lobovsky L, Laine K (2013)
Modeling manual perineal protection during vaginal delivery
Int Urogynecol J, 25 (1), 65-71
DOI 10.1007/s00192-013-2164-1, PubMed 23835811

Laine K, Skjeldestad FE, Sandvik L, Staff AC (2013)
Prevalence and Risk Indicators for Anal Incontinence among Pregnant Women
ISRN Obstet Gynecol, 2013, 947572
DOI 10.1155/2013/947572, PubMed 23819058

Räisänen S, Cartwright R, Gissler M, Kramer MR, Laine K, Jouhki MR, Heinonen S (2013)
Changing associations of episiotomy and anal sphincter injury across risk strata: results of a population-based register study in Finland 2004-2011
BMJ Open, 3 (8), e003216
DOI 10.1136/bmjopen-2013-003216, PubMed 23955189

Publications 2012

Fodstad K, Laine K, Staff AC (2012)
Different episiotomy techniques, postpartum perineal pain, and blood loss: an observational study
Int Urogynecol J, 24 (5), 865-72
DOI 10.1007/s00192-012-1960-3, PubMed 23108732

Laine K, Rotvold W, Staff AC (2012)
Are obstetric anal sphincter ruptures preventable?-- large and consistent rupture rate variations between the Nordic countries and between delivery units in Norway
Acta Obstet Gynecol Scand, 92 (1), 94-100
DOI 10.1111/aogs.12024, PubMed 23034015

Laine K, Skjeldestad FE, Sandvik L, Staff AC (2012)
Incidence of obstetric anal sphincter injuries after training to protect the perineum: cohort study
BMJ Open, 2 (5)
DOI 10.1136/bmjopen-2012-001649, PubMed 23075573

Räisänen S, Laine K, Jouhki MR, Vehviläinen-Julkunen K, Gissler M, Heinonen S (2012)
[Risk of obstetric anal sphincter injury in vaginal births could be reduced]
Duodecim, 128 (19), 1981-7
PubMed 23155749

Staff A, Laine K (2012)
Many sphincter injuries are preventable
Tidsskr Nor Laegeforen, 132 (21), 2364-5
DOI 10.4045/tidsskr.12.1168, PubMed 23160583

Publications 2011

Kalis V, Landsmanova J, Bednarova B, Karbanova J, Laine K, Rokyta Z (2011)
Evaluation of the incision angle of mediolateral episiotomy at 60 degrees
Int J Gynaecol Obstet, 112 (3), 220-4
DOI 10.1016/j.ijgo.2010.09.015, PubMed 21247571

Laine K, Skjeldestad FE, Sanda B, Horne H, Spydslaug A, Staff AC (2011)
Prevalence and risk factors for anal incontinence after obstetric anal sphincter rupture
Acta Obstet Gynecol Scand, 90 (4), 319-24
DOI 10.1111/j.1600-0412.2010.01057.x, PubMed 21306321

Publications 2009

Laine K, Gissler M, Pirhonen J (2009)
Changing incidence of anal sphincter tears in four Nordic countries through the last decades
Eur J Obstet Gynecol Reprod Biol, 146 (1), 71-5
DOI 10.1016/j.ejogrb.2009.04.033, PubMed 19482405

Publications 2008

Laine K, Pirhonen T, Rolland R, Pirhonen J (2008)
Decreasing the incidence of anal sphincter tears during delivery
Obstet Gynecol, 111 (5), 1053-7
DOI 10.1097/AOG.0b013e31816c4402, PubMed 18448735

Valbø A, Gjessing L, Herzog C, Goderstad JM, Laine K, Valset AM (2008)
Anal sphincter tears at spontaneous delivery: a comparison of five hospitals in Norway
Acta Obstet Gynecol Scand, 87 (11), 1176-80
DOI 10.1080/00016340802460354, PubMed 18972270