UGC, Clinical Analysis, H.U. Puerta Del Mar, Cádiz, Spain
Received date: May 24, 2017; Accepted date: August 04, 2017; Published date: August 14, 2017
Citation: Ruiz MMC, Pacho FH, Rodriguez MR (2017) Natural Pregnancy vs. After Assisted Reproduction treatment Pregnancy, is there a Difference in the Results of the First Quarter Prenatal Screen?. Reprod Syst Sex Disord 6:210. doi: 10.4172/2161-038X.1000210
Copyright: © 2017 Ruiz MMC, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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In the present obstetric care, prenatal diagnosis of chromosomal anomalies is a priority. Separate mention deserves the pregnancies obtained after the application of techniques of assisted reproduction (IVF / ICSI), with the controversy as to if these they carry an increase of malformations, chromosomic abnormalities, etc [1-3].
The results of all prenatal screening performed during the year 2016 are collected in our Unit through an Omnium consultation assistant.
The levels of free B-hcg and Pappa are performed between the 8-10 week of gestation while the measurement of nuchal translucency (TN) is carried out at week 12-13 of pregnancy. The biochemical markers were performed by electrochemiluminescence on the cobas 6000 analyzer from Roche Diagnostics while the calculation of multiples of the median (MoMs) and risk is performed with the SdWLab program (cutoff point 1/270).
The statistical study was performed with SPSS 15.0 package for Windows.
As we can not assume normality of the sample for the MoMs variables (according to Kolmogorov-Smimov test), hypothesis test is performed to compare means (Mann-Whitney U) and Fisher's test for comparison of screening results.
A total of 1382 prenatal screening tests were performed, corresponding to 84 (6.1%) to IVF / ICSI gestations and 1298 (93.9%) to natural gestations.
The results obtained are described in the Tables 1-3:
|Variables||Natural pregnancies n=1298||FIV/ICSI pregnancies n=84|
|Mean||67,32 ± 14,39||68,14 ± 14,77|
|Interval al 95%||66,53-68,10||64,94-71,35|
Table 1: Variables weight, smoking and diabetes in natural gestations and gestations after IVF / ICSI.
|Natural pregnancies n=1298||FIV/ICSI pregnancies N=84|
|Mean||1,14 ± 0,741||2,15 ± 7,70|
|Mean||1,00 ± 0,682||2,30 ± 8,721|
|Mean||1,01 ± 0,383||1,22 ± 2,117|
Table 2: Mean, interval confidence 95% y maximum-minimum MoMs in natural gestations and after IVF / ICSI gestations.
|Natural Pregnancies naturales||1260(97,1%)||38(2,9%)||0.366|
Table 3: Screening results.
Our study shows that there are no significant differences in multiples of the median (biochemical and ultrasound variables) or in the rate of pathological screening, which need to be confirmed by invasive techniques. In spite of this, and due to the small number of pathological cases observed, it is advisable to extend the study in order to confirm this affirmation.
The risk calculations are performed with a previously validated computer system, with modifications of the reference charts according to our experience of more than 10 years and suitable to our reference population, as recommended by all clinical practice guidelines.