*4.8. Statistical Analysis*

Statistical analysis was performed using GraphPad Prism software package® (San Diego, CA, USA). Results were expressed as raw values or mean ± SD. Significant differences (*p* < 0.05) were identified using paired non-parametric student *t* test.

**Author Contributions:** Conceptualization: M.C. and J.G.; methodology: C.F., M.H.-S., M.C. and J.G.; formal analysis: C.F.; investigation: C.F., C.L.-M. and R.L.-K.; resources: T.F.; writing—original draft preparation: C.F. and J.G.; writing—review and editing: F.B.-S.; visualization: C.F.; supervision: M.C. and J.G.; project administration: J.G.; funding acquisition, M.H.-S., J.S. and J.G. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by ANRS, PhD Grant number 17198.

**Institutional Review Board Statement:** The study was conducted according to the guidelines of the Declaration of Helsinki, and approved by the Ethics Committee (CPP 2015-mai-13909) of INSERM.

**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.

**Data Availability Statement:** Data available on request.

**Acknowledgments:** The authors thank the consenting patients and the clinical staff midwives of Cochin Port-Royal, Antony, Béclère, Beaujon and Montsouris hospitals for providing placental tissues.

**Conflicts of Interest:** The authors declare no conflict of interest.
