A pathophysiology diagram illustrating the relationship between molecular changes in gestation and clinical complications. On the left, a silhouette of a pregnant woman contains a circular inset magnification of the 'Altered intrauterine environment.' This inset displays a chemical structure (cytosine-like pyrimidine ring with nitrogen, oxygen, and hydrogen atoms), suggesting epigenetic or metabolic modifications at the molecular level. A bidirectional arrow system connects this environment to a primary box titled 'Pregnancy complication.' The list of complications includes pre-eclampsia, gestational diabetes mellitus, immune-response alterations, mitochondrial changes, placental disruption, and depression. A final arrow leads from these complications toward 'Adverse pregnancy outcomes,' which then feeds back into the intrauterine environment loop. The diagram serves as an educational summary of how maternal-fetal health is influenced by biochemical signaling pathways and physiological stressors, highlighting the cyclic nature of obstetric pathology.

Educational composite image featuring a bar graph and a correlated histological section focused on fetal neuroanatomy and morphometric analysis in a Gestational Diabetes Mellitus (GDM) model. Top: A comparative bar graph displays tissue measurements in micrometers (µm) for two brain regions: the Hippocampus and the Cortex. Four experimental groups are compared: SC (Saline Control), GDM+S (Diabetic Saline), GDM+Gla, and GDM+Glb (Diabetic groups treated with Ganoderma lucidum). Data are shown as mean ± SD, with an asterisk highlighting a statistically significant decrease in hippocampal thickness in the GDM+S group compared to control. Bottom: A low-magnification (40X) photomicrograph of a fetal encephalon histological section stained with Hematoxylin and Eosin (H&E). The section shows the characteristic laminar organization of the developing brain. A yellow arrow identifies the cortex, while a red arrow points to the hippocampus. Superimposed linear measurement markers demonstrate how the morphometric data in the graph were obtained, with specific values indicated in micrometers. This material illustrates the impact of maternal diabetes on fetal brain development and the potential neuroprotective effects of Ganoderma lucidum.

This composite diagnostic image consists of three panels (a, b, and c) showing obstetric ultrasound scans used for fetal biometry and growth monitoring in the context of Gestational Diabetes Mellitus (GDM). Panel (a) displays a transverse section of the fetal head and abdomen at 26 weeks gestation, with caliper measurements showing significantly accelerated growth. Visible biometry includes a biparietal diameter (BPD) of 7.66 cm (30w2d), femur length (FL) of 4.95 cm (28w0d), and abdominal circumference (AC) of 23.25 cm (28w6d), indicating macrosomia or large-for-gestational-age (LGA) status due to maternal hyperglycemia. Panels (b) and (c) track subsequent fetal development at 33w4d and 36w2d respectively, showing estimated fetal weights (EFW) of 2071g and 2645g. These longitudinal scans illustrate the impact of clinical interventions, such as dietary modifications and caloric restriction, on slowing excessive fetal weight gain to achieve a growth trajectory closer to the normal range. The clinical significance focuses on ultrasound's role in monitoring metabolic complications and the efficacy of glycemic control in pregnancy.

Diagnostic ultrasound image featuring a fetal echocardiogram in a 26-week gestational age fetus, used for assessing cardiac function in the context of gestational diabetes mellitus (GDM). The visual is divided into two primary sections: a top panel showing a B-mode (2D) cross-sectional view of the fetal heart and a bottom panel showing an M-mode tracing. In the B-mode image, a yellow vertical sampling line passes through the cardiac chambers to obtain the M-mode data. The M-mode tracing displays cyclical motion of the atrial walls over several cardiac cycles. Yellow callipers (marked 1-6) measure the maximum and minimum dimensions of the chamber, facilitating the calculation of the left atrial shortening fraction (LASF). Quantitative data on the right provides measurements for D1 (diastolic) and D2 (systolic) diameters and a calculated percentage value (labeled as %Sten, representing the shortening fraction). This clinical imaging study is used to evaluate for early signs of fetal myocardial dysfunction or septal hypertrophy associated with maternal GDM.

TABLE 20 Classification of Hypertensive Disorders of Pregnancy²⁰ <table><thead><tr><th>Condition</th><th>Definition</th></tr></thead><tbody><tr><td>Chronic hypertension</td><td>Diagnosis prior to pregnancy or at <20 wks' gestation</td></tr><tr><td>Gestational hypertension</td><td>De novo hypertension at ≥20 wks' gestation in the absence of proteinuria or other signs of preeclampsia</td></tr><tr><td>Preeclampsia</td><td>Gestational hypertension with proteinuria or other maternal end-organ dysfunction including neurologic findings, pulmonary edema, hematologic findings, acute kidney injury, hepatic dysfunction (Section 5.5.2 "Preeclampsia and Eclampsia, Including Preeclampsia Superimposed on Chronic Hypertension")</td></tr><tr><td>Preeclampsia superimposed on chronic hypertension</td><td>Preeclampsia in a woman with a history of hypertension before pregnancy or before 20 weeks' gestation</td></tr></tbody></table>

A medical anatomical diagram illustrating the differential cerebral involvement in preeclampsia during the antepartum and postpartum periods. The image features a sagittal view of the human brain with a red cerebral vasculature overlay, highlighting two distinct regions of clinical significance. The posterior region (occipital and parietal lobes) is shaded in tan and labeled 'Antepartum,' indicating the common occurrence of cerebral edema during pregnancy. The anterior region (frontal lobe) is labeled 'Postpartum,' specifically associated with the development of white matter lesions. This diagram serves as a visual explanation of the regional pathophysiology and neuroimaging findings associated with (pre)eclampsia, emphasizing how the timing relative to delivery (pregnancy vs. postpartum) correlates with specific anatomical localizations of brain injury. Key educational concepts include the clinical manifestations of hypertensive disorders of pregnancy, blood-brain barrier disruption, and regional vascular susceptibility in the brain.

This pathophysiology diagram illustrates proposed causal pathways in the pathogenesis of Hypertensive Disorders of Pregnancy (HDP), specifically Pre-eclampsia (PE), Essential Hypertension (EH), and Gestational Hypertension (GH). The diagram is divided into two parallel signaling pathways demonstrating the relationship between HLA DR expression on Dendritic Cells (DCs) and HDP outcomes, mediated by Apolipoprotein A (apoA) levels. The top pathway shows 'HLA DR on myeloid DC' having both a direct effect on PE (0.074) and EH (0.148) and an indirect effect mediated through apoA levels. The bottom pathway shows 'HLA DR on DC' with direct effects on GH, PE, and EH, alongside a mediated pathway through apoA. Numerical beta values (βa and βb) quantify the causal associations at each node. Representative icons include a dendritic cell, a cluster of dots for apoA levels, and a stylized fetal/placental icon representing HDP. This infographic serves as a summary of Mendelian Randomization and mediation analysis results in obstetric immunology research.