Adherence to Swedish nationwide maternity dating recommendations and management of discrepancies between maternity dating practices: a research study

Adherence to Swedish nationwide maternity dating recommendations and management of discrepancies between maternity dating practices: a research study


Swedish nationwide tips for maternity relationship had been posted this season. Follow-up is required to evaluate adherence also to recognize whether any topics that are clinical perhaps maybe not covered within the directions.


All units in Sweden that performed pregnancy that is ultrasound-based were asked to accomplish a web-based questionnaire comprising multiple-response concerns and commentary industries. Information ended up being gathered regarding baseline information, present and previous medical training, and handling of discrepancies between last-menstrual-period- and ultrasound-based options for maternity relationship.


The reaction rate had been 79%. 1 / 2 of the devices offered ultrasound that is first-trimester all women that are pregnant. Nonetheless, as opposed to the principles, the crown–rump size had not been useful for ultrasound-based maternity dating generally in most units. Rather, ultrasound-based maternity relationship had been performed only when the biparietal diameter had been between 21 and 55 mm. Handling of discrepancies between methods for pregnancy relationship varied widely.


The devices reported adherence that is high nationwide directions, with the exception of very very early pregnancy dating, which is why numerous devices implemented unwritten or casual directions. The handling of discrepancies between last-menstrual-period-based and ultrasound-based day that is estimated of varied commonly. These findings stress the necessity for regular updating of nationwide written instructions and efforts to fully improve their execution in most devices.

Ordinary English summary

Nationwide Swedish instructions were posted this season regarding just how length that is pregnancy be predicted by way of ultrasound. This research is dependent on a study which was submitted 2017 to all the units that perform ultrasound exams to calculate maternity size in Sweden. Desire to would be to explain the units’ current and previous routines pertaining to the nationwide directions. Additionally, there have been concerns about what the devices did if there clearly was a huge difference involving the maternity size whenever determined through the final menstrual period or predicted because of the fetus’s size at an ultrasound assessment. The units followed the guidelines, with the exception of early ultrasound examinations for most parts. In lots of devices fetal measurements corresponding to a maternity amount of 11 months are not utilized to estimate a maternity size plus the outcomes from an early on ultrasound assessment were just utilized in the event that measurements corresponded up to a maternity amount of at minimum 12 weeks. Whenever there have been two various maternity lengths if final menstrual duration or if ultrasound ended up being utilized, some devices planned a follow-up plus some would not. These outcomes stress the significance of following up the utilization of brand brand new instructions to perceive which routines are now actually utilized and when there was a need to restore the principles.

Key message

With the exception of very very early relationship, adherence into the Swedish guidelines that are national maternity relationship had been good. Handling of discrepancies between menstrual-period-based and ultrasound-based gestational age diverse commonly.


Calculating gestational age correctly is fundamental to supply good quality antenatal care. Utilizing the introduction of obstetric ultrasound, there is a shift from last-menstrual-period-based to estimation that is ultrasound-based of age. The strategy together with timing of ultrasound maternity relationship is crucial because it may influence the accuracy of maternity dating, rates of pre- and postterm birth, and prices of small-for-gestational-age infants 1,2,3. You will find nationwide and worldwide instructions on maternity relationship. But, nationwide tips are not necessarily implemented as intended, and followup is necessary to assess adherence 4, 5.

Pregnancy dating by ultrasound ended up being introduced in Sweden during significantly more than a ten years, beginning in 1976 6. A 1996 study predicated on responses from 55 associated with the 59 ultrasound devices in Sweden stated that ultrasound maternity relationship had been used by 52 devices within the 2nd trimester (at week 16–20) and three devices in the 1st trimester (week 10–15) 6. Second-trimester ultrasound assessment for maternity dating and anomaly screening has become regularly wanted to all expecting mothers, totally free, included in the maternal medical care program in Sweden, and it is typically done by a midwife that is specialized. First-trimester ultrasound assessment has been introduced up to a varying level, mostly into the context of chromosomal assessment 7.

In accordance with law that is swedish the county councils have to offer good-quality, need-based medical care similarly to any or all citizens 8. If you have need that is special prioritization also to assist decision-making centered on population needs, the personal Board of Welfare posts national recommendations 9. Nevertheless, many recommendations are manufactured by the clinics on their own or by way of a specialty college that is medical. This year, a workshop committee set up by effort for the ultrasound portion of the Swedish Association for Obstetricians and Gynecologists published fetal biometry and maternity dating recommendations after 12 months of preparations. The principles had been talked about at area conferences, plus the association’s yearly meeting, and had been then freely posted from the association’s homepage 10. The present Swedish along with worldwide guidelines suggest maternity dating centered on a first-trimester examination that is ultrasound if performed 10, 11. The Swedish directions state that maternity dating can be carried out between 11 and 22 days of gestational age, and preferably at 11–14 months, in line with the crown–rump length (CRL) before the biparietal diameter (BPD) is 21–55 mm 10. In america, as an example, directions recommend maternity dating on ultrasound measurements as long as there is certainly a specific discrepancy because of the last-menstrual-period-based estimate 12.

No study since 1998 has described the Swedish clinical practice in pregnancy dating or adherence to guidelines to our knowledge. There was deficiencies in studies on medical techniques concerning the observed reliance of calculated age that is gestational. Commonly, gestational age is first approximated according to your final menstrual duration after which by ultrasound. There clearly was normally a discrepancy between both of these practices, and bigger discrepancies are connected with adverse perinatal results 13. Handling of discrepancies between maternity dating techniques are maybe maybe not contained in the Swedish recommendations, which is unknown exactly just how discrepancies are handled in clinical training.

The principal aims with this research had been to spell it out present training for maternity dating in Sweden and also to evaluate adherence to instructions on maternity relationship. The additional aim ended up being to assess medical training concerning discrepancies between options for maternity relationship.

back to top

Este sitio web utiliza cookies para que usted tenga la mejor experiencia de usuario. Si continúa navegando está dando su consentimiento para la aceptación de las mencionadas cookies y la aceptación de nuestra política de cookies, pinche el enlace para mayor información.plugin cookies

Aviso de cookies

Offline ! We will start taking orders in

0Hours 0Minutes 0Seconds