biology

Jaime Zipper

Jaime Zipper 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 Jaime Zipper rather than just read about it. In short: Jaime Zipper (20 January 1926 – 16 March 2011) was a Chilean physician and scientist who, with American Howard Tatum, created the first T-shaped copper intrauterine device. Zipper discovered the contraceptive properties of intrauterine copper.

Key takeaways

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

Reference excerpt

Jaime Zipper (20 January 1926 – 16 March 2011) was a Chilean physician and scientist who, with American Howard Tatum, created the first T-shaped copper intrauterine device. Zipper discovered the contraceptive properties of intrauterine copper.

Early life and education The child of Polish Jews Gustavo Zipper and Juana Antonia Abragan, Jaime Zipper was born in Lviv, Ukraine. The family moved to Mulchén, Chile, and then to Santiago. He studied at the Liceo José Victorino Lastarria and subsequently completed his secondary education at the Internado Nacional Barros Arana. From an early age, Zipper showed a deep interest in science, and went on to study medicine at the Universidad de Chile. He earned his doctoral degree in 1953 with a thesis entitled "Contribución al estudio de la Hidatidosis en Chile" (transl. "Contribution to the study of echinococcosis in Chile"). In his final three years of study, he was an assistant professor of parasitology. Between 1961 and 1962, he was a postdoctoral researcher in reproductive physiology at the Worcester Foundation for Experimental Biology in the United States. There, he worked with Gregory Goodwin Pincus, the developer of the first oral contraceptive pill.

Academic career In 1963, he became associate professor of physiology in the Department of Physiology and Biophysics at the University of Chile. Between 1967 and 1969 he served as the medical head of the Department of Human Reproduction of the World Health Organization in Switzerland, and he remained a professor during that time. In 1981 he was awarded tenure as a full professor of physiology, and in 2004 he was named professor emeritus at the University of Chile. In 1959, Zipper introduced the first IUD made in Chile, dubbed the Zipper ring. It was made of a nylon monofilament, and was implemented in maternity hospitals for underserved populations, notably the Hospital Barros Luco. He investigated older devices, such as the Gräfenberg ring, made with a copper-nickel-zinc alloy (nickel silver), whose efficacy was erroneously attributed to metal in general, not copper. Zipper concluded that the spermicidal activity of the device was related to the percentage of copper in the alloy, and worked with international colleagues, notably the Americans Jack Lippes and Howard Tatum, to develop a more effective IUD. In 1970, based on his research, he introduced a T shaped device made with copper, a design that persists in many modern copper IUDs. Zipper also was known for his research into a technique for permanent sterilization using a small dose of quinacrine delivered transcervically.

Death and legacy Zipper died in the morning of March 16, 2011 of complications due to Parkinson's disease. He was recognized for his contributions to global health in reducing maternal mortality due to unintended pregnancy and unsafe abortion.

Awards and honors Premio de la Sociedad Chilena de Obstetricia y Ginecología, 1954. Samuel L. Siegler Lecture of the American Fertility Society, for his publication “Human Fertility Control by Transvaginal Application of Quinacrine on the Fallopian Tube”, 1970. Ernst Gräfenberg Prize, Germany, 1983. Award for his relevant contributions in the field of human reproduction, 10th World Congress of Human Reproduction in Brazil, 1999 Honorary Member of the Sistema Nacional de Salud of the Chilean Ministry of Health, 1999. Honored as one of the forebears of modern contraception by Centro Latinoamericano Salud y Mujer (CELSAM) , 2000. Honored at the 17th congress of FIGO, 2003 Recognized by the Chilean MInistry of Health for his research into contraception, 2004

Publications Zipper [et al]. “Influence of hormonal factors and intrauterine contraceptive devices on the acceptance of an intrauterine autograft”. Am J Obstet Gynecol. 1969 Jan; 103(1): 86-9. Zipper [et al]. “Metallic copper as an intrauterine contraceptive adjunct to the “T” device”. Am J Obstet Gynecol. 1969 Dec 15; 105(8): 1274-8. Zipper [et al]. “Human fertility control by transvaginal application of quinacrine on the fallopian tube”. Fertil Steril. 1970 Aug; 21(8):851-9. Zipper [et al]. “Studies of the physiological activity of IUDs containing copper”. Contraception. 1975 Jul; 12(1): 1-10. Zipper [et al]. “Quinacrine nonsurgical female sterilization: a reassessment of safety and efficacy”. Fertil Steril. 1985 Sep; 44(3):293-8. Zipper [et al]. “Quinacrine and copper, compounds with anticonceptive and antineoplastic activity”. Contraception. 1994 Sep; 50(3):243-51. Zipper [et al]. “Quinacrine sterilization: a restrospective”. Int J Gynaecol Obstet. 2003 Oct; 83 Suppl 2:S7-11. Review

References

Illustrations

Worked examples

Example 1 — a first encounter with Jaime Zipper

Start with the simplest possible case. Write down what Jaime Zipper 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 Jaime Zipper 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 Jaime Zipper 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 Jaime Zipper

In research: Jaime Zipper 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 Jaime Zipper 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: Jaime Zipper is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1926 births, 2011 deaths, 20th-century Chilean educators, so understanding it makes those chapters shorter.
In everyday life: Look for Jaime Zipper 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 Jaime Zipper in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Jaime Zipper 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 Jaime Zipper out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Jaime Zipper in simple terms?

Why does Jaime Zipper 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 Jaime Zipper?

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 Jaime Zipper.