biology

Kyusaku Ogino

Kyusaku Ogino is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Kyusaku Ogino rather than just read about it. In short: Kyusaku Ogino (荻野久作, Ogino Kyūsaku; 25 March 1882 – 1 January 1975) was a Japanese medical doctor specializing in obstetrics and gynecology. His natural father's family name was Nakamura, but Kyusaku was adopted by the Ogino family in 1901.

Key takeaways

Kyusaku Ogino belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Kyusaku Ogino to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Kyusaku Ogino from memory before moving on to harder problems.

Reference excerpt

Kyusaku Ogino (荻野久作, Ogino Kyūsaku; 25 March 1882 – 1 January 1975) was a Japanese medical doctor specializing in obstetrics and gynecology. His natural father's family name was Nakamura, but Kyusaku was adopted by the Ogino family in 1901. Ogino studied infertility and developed a method to estimate the fertile period of the menstrual cycle based on the length of a woman's past cycles. This knowledge could be used by couples seeking pregnancy to time intercourse so as to maximize the chances of conception. In 1930, John Smulders, Roman Catholic physician from the Netherlands, used this discovery to create a method for avoiding pregnancy. Smulders published his work with the Dutch Roman Catholic medical association, and this was the official Rhythm Method promoted over the next several decades. Ogino opposed the use of his method for contraception. He argued that its failure rate was too high: to promote it for contraception, despite the availability of other effective contraceptive methods, would result in many abortions from unwanted pregnancies. Despite this, the Rhythm Method of contraception is ironically referred to as the Ogino Method (オギノ式, ogino-shiki) in Japan. Babies born to parents using this method are known in France as "bébés Ogino."

References

Illustrations

Kyusaku Ogino: Ogino in 1924 — Ogino in 1924

Worked examples

Example 1 — a first encounter with Kyusaku Ogino

Start with the simplest possible case. Write down what Kyusaku Ogino claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Kyusaku Ogino before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Kyusaku Ogino ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Kyusaku Ogino

In research: Kyusaku Ogino appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Kyusaku Ogino in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Kyusaku Ogino is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1882 births, 1975 deaths, Asian medical biography stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Kyusaku Ogino outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Kyusaku Ogino in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Kyusaku Ogino means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Kyusaku Ogino out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kyusaku Ogino in simple terms?

Why does Kyusaku Ogino matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Kyusaku Ogino?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Kyusaku Ogino.