Reproduction 6.6 & 11.4

First, the new syllabus. Core/SLnew syllabus 6 6 hormones homeostasis and reproduction anew syllabus 6 6 hormones homeostasis and reproduction b

A learning powerpoint for the SL/Core material: 6.6 NOTES Reproduction. This mostly follows a questions and answer process. It is especially useful because it follows the new syllabus.

HLnew syllabus 11 4 sexual reproduction hl

The SL/Core material is incorporated into a module (6.6) which handles HORMONES, HOMEOSTASIS  & REPRODUCTION. Here is the specific detail about the topic of reproduction:WORD 6 6 REPRODUCTION

Reading! Unfortunately the new syllabus extracts  bits and pieces of the bigger theme and to use a non-IB textbook is not straightforward. Here are some of the more useful pages from BIOLOGY IN CONTEXT for Cambridge International A Level, by Glenn and Susan Toole, with some other material added:

GAMETOGENESIS (HL) (with some other images)

gametogenesis 1gametogenesis 2spermatogenesisSpermatogenesis_in_Testistestis_tissue_med02_oogenesis


fertilisation development 1fertilisation development 2



There are a whole stack of good images out there on the internet, which show the manner in which the reproductive hormones interact during the menstrual cycle. You should focus upon LH (lutineising hormone), FSH (follicle stimulating hormone), oestrogen and progesterone. Here are two images:MenstrualCyclehormone interaction menstrual cycle

And here is a powerpoint: Menstrual cycle ppt


You need to be able to identify and label parts.


William Harvey gets a lot of mentions in the new syllabus! Here’s the story in the shortest form:

  • William Harvey and Sexual Reproduction
  • Omne vivum ex ovo” All life comes from the egg.
  • In 1651 he asserted that all life developed from the egg
  • Harvey was right in some ways but was limited by his observations as the microscope was not invented until 17 years after his death.

Harvey’s ideas resulted from some prolonged and exacting investigations into the carcasses of deer hunted and killed by King Charles 1st. It wasn’t until early users of microscopes began examining sperm cells, that Harvey’s proposals were modified. One of the first users of the early, crude microscopes was Antonj van Leeuwenhoek (1632-1723) and he published observations about spermatozoa which led to a steady development of ideas over the next two centuries.

Some quite detailed HL learning powerpoints:

11.4 HL Reproduction PART 1

11.4 reproduction part 2

IB PAST PAPER MC QUESTIONS (from the previous syllabus)

This is a topic which is always well questioned in the multiple choice Paper I.

Eyyy! edited