Crash Course
Reproductive System, part 3 - Sex & Fertilization: Crash Course A&P
After weeks of discussion of human reproduction, today we arrive at the main event: THE SEX. Hank explains the four phases of the human sexual response, how a sperm finds and fertilizes an egg, creating a zygote, and how different types...
SciShow
Superfetation: When You Get Pregnant... Even Though You're Already Pregnant
The process of human baby making seems pretty straightforward: egg+sperm+time=baby. But hold on to your ovaries, folks! It’s pretty rare, but sometimes, days or weeks after a person gets pregnant, they can get pregnant again in a process...
TED-Ed
TED-Ed: How to make a baby (in a lab) - Nassim Assefi and Brian A. Levine
Infertility affects 1 in 8 couples worldwide. But in the last 40 years, more than 5 million babies have been born using in vitro fertilization (IVF). How does it work? Nassim Assefi and Brian A. Levine detail the science behind making a...
SciShow
Why Is There Another Pepper Inside My Pepper?
It's Taco Tuesday and you're chopping up some tasty bell peppers for that nice sweet crunch. But what's this? A pepper inside your pepper? Is nature playing a prank on you or is there more to it?
SciShow
9 of the Weirdest Sperm Adaptations
You probably have a vague idea of what sperm does, but not all sperm are created equal, and some have even developed unique adaptations to get where they're going.
Crash Course
Animal Development: We're Just Tubes - Crash Course Biology
Hank discusses the process by which organisms grow and develop, maintaining that, in the end, we're all just tubes.
SciShow
5 Things We Still Get Wrong About Human Reproduction
You'd think we'd know everything there is to know about sexual reproduction. But as it turns out, there are still quite a few things we picked up that aren't exactly true, and we're here to correct that. Chapters NEW EGGS 1:47 MENSTRUAL...
Crash Course
Reproductive System, part 1 - Female Reproductive System: Crash Course A&P
Human reproduction is complicated an important, and it's going to take a four part series for us to cover it. Today, we're kicking that off with the female reproductive system, starting with how sex hormones affect oogenesis and...
Crash Course
Heredity: Crash Course Biology
Hank and his brother John discuss heredity via the gross example of relative ear wax moistness.
Crash Course
The Sex Lives of Nonvascular Plants: Alternation of Generations - Crash Course Biology
Hank introduces us to nonvascular plants - liverworts, hornworts & mosses - which have bizarre features, kooky habits, and strange sex lives. Nonvascular plants inherited their reproductive cycle from algae, but have perfected it to the...
Bozeman Science
Cell Cycle, Mitosis and Meiosis
Paul Andersen explains how the cell cycle is used to create new cells. The creation of identical diploid daughter cells, through mitosis, is described. The creation of unique haploid daughter cells, through meiosis is also described. The...
Curated Video
Assisted Reproductive Technologies: Exploring Methods and Options for Conception
This video explores the miracles of Assisted Reproductive Technologies (ART) and the various methods and technologies available to help individuals and couples overcome infertility. From in vitro fertilization to third-party ART, the...
Curated Video
Zygote
The cell produced by the fusion of an egg and a sperm at fertilisation. The zygote contains DNA from both the male and female parents, providing all the genetic information required for a new individual. A Twig Science Glossary Film. Key...
Curated Video
Meiosis
A type of cell division important to produce sex cells such as eggs and sperm. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...
Curated Video
Gamete
A reproductive cell, such as a sperm or egg cell. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce abstract...
Curated Video
Conception
Another word for fertilisation - when two sex cells combine to create a new organism. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...
Curated Video
Factpack: Twins
Find out how twins can be different, and how this is determined at the time of conception. Biology - Cells And DNA - Learning Points. A Twig FactPack Film. Open a discussion on what has been already learnt in a topic, or use to grab...
Curated Video
Sperm
Male reproductive cells, also referred to as the male gametes. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...
Curated Video
The Genius Sperm Bank: Part 1
Millionaire Robert Graham dreamed of "saving the human race" with a Genius Sperm Bank. More than 200 children were born - were any of them geniuses? Biology - Cells And DNA - Learning Points. Millionaire Robert Graham set up the...
Curated Video
Factpack: Pregnancy Timeline
See what's happening during different stages of pregnancy, as the baby changes from conception to birth. Biology - Being Human - Learning Points. A Twig FactPack Film. Open a discussion on what has been already learnt in a topic, or use...
Curated Video
The Moon and Its Effect On Life
The cycles of the Moon are said to affect reproductive rhythms, from humans to coral. How could this be? Physics - Our Solar System - Learning Points. The Moon exerts a strong influence over life cycles on Earth. Cycles of the Moon have...
Curated Video
Marbled Salamanders
Why the female marbled salamander must abandon her eggs in order to survive. Biology - Animal Kingdom - Learning Points. Unlike most salamanders, the marbled salamander reproduces entirely on land. The male drops sperm onto the ground...
Curated Video
Contraception: Barrier Methods
Discover how barrier methods of contraception can not only prevent pregnancy but stop the spread of sexually transmitted infections. Biology - Being Human - Learning Points. Barrier method contraceptives prevent the sperm from reaching...
Curated Video
The Genius Sperm Bank: Part 2
Meet the grown-up designer babies created by Robert Graham's Genius Sperm Bank in 1970s America. Were any geniuses? Biology - Cells And DNA - Learning Points. Germinal choice was introduced by millionaire Robert Graham. Children born of...