Objective: Defective placentation and inadequate trophoblastic invasion have an important place in the aetiology of preeclampsia (PrE). Trophoblasts invade the maternal decidua and remodel spiral arteries with matrix metalloproteinase-14 (MMP-14). To the best of our knowledge, studies of MMP-14 protein levels of PrE patients' sera remain unpublished. This study aims to investigate the value of serum MMP-14 and soluble endoglin (s-ENG) in PrE patients and healthy controls.

Methods: The study was conducted with 30 late-onset preeclampsia patients (L-PrE) as group1 (gestational age≥34 weeks), 33 patients with normal pregnancies as group2 (gestational age≥34 weeks), 31 early-onset preeclampsia patients (E-PrE) as group3 (gestational age<34 weeks), and 31 patients with normal pregnancies as group 4 (gestational age<34 weeks). Serum MMP-14 and s-ENG levels measured by ELISA were compared.

The study was conducted at Cengiz Gokcek Women's and Children's Hospital, Gaziantep, Turkey at department of obstetrics and gynecology between date of January 2018 and December 2018. The study protocol was designed according to the Declaration of Helsinki, and the institutional ethical review board of Gaziantep University approved the study (Reference number: 2018/91). One hundred twenty-five women enrolled in the study in four groups. The investigators consecutively recruited 61 pregnancies complicated with preeclampsia, and 64 healthy pregnancies will select for the control group. All participiants gave their oral and written informed consent before their inclusion in the study.

Inclusion Criteria:

• preeclampsia
• healthy pregnancy

Exclusion Criteria:

• pregnant women with any systemic condition (such as chronic hypertension, diabetes mellitus, thyroid diseases, liver and kidney diseases)
• women with a history of drug use throughout pregnancy
• history of medication for PE treatment at the time of first admission
• patients who had fetal congenital abnormalities or genetic syndromes
• multiple gestations
• active labour

pregnancy. Preeclampsia is a pregnancy complication characterized by high blood pressure and signs of damage to another organ system, most often the liver and kidneys. Preeclampsia usually begins after 20 weeks of pregnancy in women whose blood pressure had been normal. Early-onset preeclampsia is usually defined as preeclampsia that develops before 34 weeks of gestation, whereas late-onset preeclampsia develops at or after 34 weeks of gestation.

The investigators consecutively will recruite 61 subjects with preeclampsia, and 64 healthy preganancies will selecte for the control group.

Preeclampsia is a pregnancy complication characterized by high blood pressure and signs of damage to another organ system, most often the liver and kidneys. Preeclampsia usually begins after 20 weeks of pregnancy in women whose blood pressure had been normal. Early-onset preeclampsia is usually defined as preeclampsia that develops before 34 weeks of gestation, whereas late-onset preeclampsia develops at or after 34 weeks of gestation.