Related Experiment Video
Updated: Jan 29, 2026

06:01
Transcranial Direct Current Stimulation for Online Gamers
Published on: November 9, 2019
8.5K
Dissecting the current caesarean section rate in Shanghai, China
Yanhong Ming1,2,3, Meng Li3,4, Fei Dai4
1Department of Obstetrics and Gynecology, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China.
Scientific Reports
|February 16, 2019
Summary
High rates of caesarean sections (CS) persist in Shanghai. Prelabor CS in low-risk, first-time mothers significantly drives this trend, often without clear medical necessity.
Area of Science:
- Obstetrics and Gynecology
- Public Health
- Epidemiology
Background:
- High caesarean section (CS) rates are a global concern.
- Limited large-scale data exists for the Chinese population.
- Understanding CS drivers is crucial for public health interventions.
Purpose of the Study:
- To analyze the caesarean section rate in Shanghai.
- To identify the primary contributors to high CS rates using the Robson classification system.
Main Methods:
- A cross-sectional survey of 10,855 births in Shanghai hospitals (Jan-Jun 2016).
- Data extracted from medical records.
- Application of the Robson classification system to categorize CS births.
Main Results:
- The overall CS rate was 41.5%.
- Prelabor CS in nulliparous, term singleton vertex women was the largest contributor (37.4%) to total CS.
- Repeat CS in women with a prior CS was very high (96.6%).
Conclusions:
- Caesarean section rates remain high in Shanghai.
- Prelabor CS in low-risk, nulliparous women is a major driver of high CS rates.
- Addressing non-medically indicated CS in nulliparous women is essential.
Related Concept Videos
Reaction Rate
62.7K
The rate of reaction is the change in the amount of a reactant or product per unit time. Reaction rates are therefore determined by measuring the time dependence of some property that can be related to reactant or product amounts. Rates of reactions that consume or produce gaseous substances, for example, are conveniently determined by measuring changes in volume or pressure.
The mathematical representation of the change in the concentration of reactants and products, over time, is the rate...
The mathematical representation of the change in the concentration of reactants and products, over time, is the rate...
62.7K
Related Rates
47
When two or more physical quantities are linked by a single relationship, a change in one variable necessarily affects the others. This interdependence forms the basis of related rates analysis, which examines how different quantities change with respect to time. A classic physical example is an expanding balloon, where the size of the balloon changes continuously as air is added.For a hot air balloon, the inflated envelope is commonly idealized as a perfect sphere to simplify mathematical...
47
Speciation Rates
22.8K
Overview
22.8K
Electrical Current
7.1K
Electrical current is defined as the rate at which charge flows. When there is a large current present, such as that used to run a refrigerator, a large amount of charge moves through the wire in a small amount of time. If the current is small, such as that used to operate a handheld calculator, a small amount of charge moves through the circuit over a long period of time. The SI unit for current is the ampere (A), named for the French physicist André-Marie Ampère (1775–1836).
7.1K
Measuring Reaction Rates
28.9K
Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical...
28.9K
Rate-Determining Steps
37.0K
Relating Reaction Mechanisms
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
37.0K

