Pregnancy combined with chronic hypertension is a relatively common medical comorbidity during pregnancy, which has a tendency to induce and exacerbate hypertension by pregnancy. 90% of the cases are primary hypertension with unknown causes of hypertension, while others are often secondary to renal disease, diabetes, hyperthyroidism, pheochromocytoma and SLE. The diagnosis of gestational combined chronic hypertension is generally made during pregnancy based on a history of hypertension prior to pregnancy or the onset of hypertension before the 20th gestational week of pregnancy. The criteria for classification of hypertension are mild hypertension: systolic blood pressure at 140-159 and diastolic blood pressure at 90-99 mmHg; moderate hypertension: systolic blood pressure at 150-179 and diastolic blood pressure at 100-109 mmHg: severe hypertension: systolic blood pressure at 180-209 and diastolic blood pressure at 110-119 mmHg; very severe hypertension: systolic blood pressure ≥ 210 and diastolic blood pressure ≥ 120 mmHg. The degree of disease and concomitant complications of hypertension such as hypertensive heart disease, renal insufficiency, history of cerebrovascular accident or retinal hemorrhage and exudate are strongly associated with pregnancy outcome and may present a risk to maternal life. The clinical evaluation of women with chronic hypertension is important for both counseling and treatment during pregnancy. Ideally, preconception counseling should be performed when pregnancy is planned, to the small high like this, and post-pregnancy counseling may be risky for some of the more severe chronic hypertension, and counseling focuses on determining the duration of chronic hypertension, the level of blood pressure control, and the treatment with anti-hypertensive medications; and the need to know if some complications of adverse events; the evaluation also includes assessment of renal function, liver function, and cardiac function, and for women with ventricular hypertrophy, suggesting chronic hypertension and suboptimal blood pressure control, who may be at risk for heart failure during pregnancy; for women whose diastolic blood pressure persists above 110 mmHg after treatment, who require multiple antihypertensive medications, or whose serum creatinine exceeds 2 mg/dl, pregnancy is The second purpose of pre-pregnancy counseling is that some women with severe chronic hypertension, who need to apply antihypertensive drugs to control blood pressure, need to discontinue drugs that affect the fetus before pregnancy, such as angiotensin-converting enzyme inhibitors and diuretics. It is possible to switch to first-line drugs such as methyldopa or second-line drugs labetalol or calcium antagonists to regulate blood pressure and to make the drug use the smallest drug dose. The good news is that Xiao Gao’s history and tests are in the range of a pregnancy that can continue and does not require medication to lower blood pressure. Most pregnant women with chronic hypertension who are able to continue their pregnancy will have a temporary drop in blood pressure in mid-trimester, with most cases rising to slightly higher levels in late pregnancy than in early pregnancy. The fact that a pregnancy can continue does not mean that the pregnancy is free of abnormalities; the outcome of pregnancy in these patients depends largely on whether it is complicated by preeclampsia. Chronic hypertension in pregnancy predisposes to preeclampsia, and it occurs early and severely, mainly with a sudden rise in blood pressure and a large amount of proteinuria, which may also lead to heart failure, intracranial hemorrhage and eclampsia, etc. The main treatment is a combination of antispasmodic and antihypertensive drugs, which can only temporarily control blood pressure, and eventually requires termination of pregnancy to control the disease, leading to preterm delivery of the fetus and a poor prognosis. The risk of placental abruption in pregnancy combined with chronic hypertension is 2-3 times higher than that of normotensive pregnant women. In normal pregnant women, the fetus is usually delivered at full term and then the placenta is abducted and delivered, while placental abruption is the abruption of the placenta before the fetus is delivered, triggering intrauterine bleeding, which can be outward, through the vaginal outflow, or the bleeding can accumulate in the uterine cavity and penetrate into the myometrium of the uterine wall, which can cause fetal death in the uterus, uterine stroke, decreased uterine contractility after delivery or during cesarean section, which can lead to severe postpartum bleeding, combined with Complications such as DIC can be further complicated by acute renal failure. Intrauterine growth retardation can occur in the fetus, the incidence of which is directly related to the severity of hypertension, especially when it is complicated by preeclampsia, where the fetus stops growing after the appearance of large amounts of proteinuria, which can cause adverse perinatal outcomes such as fetal death in utero or intrauterine asphyxia. Of course most pregnant women with chronic hypertension have easily controlled blood pressure during pregnancy, and the aim of treating hypertension is to control blood pressure and avoid some complications. Blood pressure at or above 90 mmHg diastolic pressure requires medication, and first-line drugs such as methyldopa or second-line drugs labetalol or calcium antagonists can be used, with the goal of keeping blood pressure under control at about 140/90 mmHg, as reported by some sources Early acceptance can reduce concurrent preeclampsia and reduce other complications.