Geneva, Switzerland and Boston, MA - February 23, 2018 - ObsEva SA (NASDAQ: OBSV), a clinical-stage biopharmaceutical company focused on the development and commercialization of novel therapeutics for serious conditions that compromise a woman's reproductive health and pregnancy, today announced that it will release the top line results from the IMPLANT2 clinical trial of its oxytocin receptor antagonist, Nolasiban, which is being developed for improving pregnancy rate following in vitro fertilization (IVF/ICSI) procedures, on the morning of Monday February 26, 2018. ObsEva management will host an investment community conference call at 8 a.m. Eastern Time, 2 p.m. Central European Time, on February 26, 2018 to discuss these results.

Investors may participate by dialing +1(844) 419-1772 for U.S. callers and +1(213) 660-0921 for international callers, and referring to conference ID 9784807. The webcast can be accessed under the "Investors" section of ObsEva's website www.obseva.com

About ObsEva
ObsEva is a clinical-stage biopharmaceutical company focused on the clinical development and commercialization of novel therapeutics for serious conditions that compromise a woman's reproductive health and pregnancy. Through strategic in-licensing and disciplined drug development, ObsEva has established a late-stage clinical pipeline with development programs focused on treating endometriosis, uterine fibroids, preterm labor and improving ART outcomes. ObsEva is listed on The NASDAQ Global Select Market and is trading under the ticker symbol "OBSV". For more information, please visit www.ObsEva.com.

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Media Contact:
Liz Bryan
Spectrum Science
lbryan@spectrumscience.com
202-955-6222 x2526

CEO Office contact:
Shauna Dillon
shauna.dillon@obseva.ch
+41 22 552 1550

Investor Contact:
Mario Corso
Senior Director, Investor Relations
mario.corso@obseva.com
781-366-5726

Attachments:

http://www.globenewswire.com/NewsRoom/AttachmentNg/875bf795-85d0-4113-b453-10a7f908f49c

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