Abstract
BackgroundThis study was made to figure out, does low and high estradiol levels during in vitro fertilization (IVF) cycles have a different effect on carotid artery distensibility (Cdis), carotid artery diameter (Cdia), blood pressure and metabolic factors? Can the stimulation protocol be considered safe to women’s vasculature?MethodsWe studied 28 women having a long agonist protocol IVF-treatment in Kuopio University Hospital during the years 2011–2016. Patients were examined at three time points: in the beginning of their own period (low estradiol), during the gonadotrophin releasing hormone (GnRH) analogue downregulation (low estradiol) and during the follicle stimulating hormone (FSH) stimulation (high estradiol). Women served as their own controls and their menstrual phase (2- to 5-day period after the beginning of menstruation with low estrogen) was used as the reference. Cdis and Cdia were assessed using ultrasound. Blood pressure, weight, estradiol levels and lipids were monitored.ResultsCdis, Cdia, systolic and diastolic blood pressures peaked during the GnRH-analogue treatment with the lowest estradiol levels. Cdis, Cdia and systolic blood pressures declined by 11% (P = 0.002), 3,8% (P < 0.001) and 2,5% (P = 0.026) during the FSH-stimulation when the estradiol levels were high. Cdis correlated significantly (P < 0.05) with systolic blood pressure, diastolic blood pressure and triglycerides in high estrogenic environment and with diastolic blood pressure (P < 0.05) when estrogen profiles were low.ConclusionsCarotid artery stiffens during the high estradiol levels compared to low levels and this was not explained by the higher diameter of the carotid artery, hyperlipidemia or blood pressure profiles. All the changes in Cdis and Cdia are variations of normal, and if there is no history of cardiovascular problems, it can be considered, that the stimulation protocol is not hazardous to vasculature.
Highlights
This study was made to figure out, does low and high estradiol levels during in vitro fertilization (IVF) cycles have a different effect on carotid artery distensibility (Cdis), carotid artery diameter (Cdia), blood pressure and metabolic factors? Can the stimulation protocol be considered safe to women’s vasculature?
Cdis value was at its highest level during the lowest, postmenopausal estradiol level in visit 2
Average Cdis became lower when the estradiol level was high in visit 3
Summary
This study was made to figure out, does low and high estradiol levels during in vitro fertilization (IVF) cycles have a different effect on carotid artery distensibility (Cdis), carotid artery diameter (Cdia), blood pressure and metabolic factors? Can the stimulation protocol be considered safe to women’s vasculature?. In normal pregnancy estradiol levels increase about 100 times over non-pregnant levels, varying from approximately 4.6–7.3 nmol/l in the beginning of pregnancy (8 weeks) to 53.6–62.4 nmol/l in the end of pregnancy (40 weeks), [2]. It has been shown, that along this 10-fold estrogen increase Cdis declined 36% from the first trimester to third trimester [3, 4], suggesting that an increase in a very high estrogen environment has opposite effects to those seen in normal menstrual cycle. The estradiol level varied from 0.04 to 0.33 nmol/l (mean, placebo vs. HRT) and Cdis increased 32% in women using estradiol only and 40% women who received estradiol combined with progesterone
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
