[Babase] Matured BY dates for females

Susan Alberts alberts at duke.edu
Sun Aug 27 15:55:10 EDT 2006


Thanks, I've got it now.

Susan

On Aug 27, 2006, at 3:28 PM, Catherine Markham wrote:

> Hi Susan,
>
> Yes, I think you've got it.  Taking 178 days prior to the birth of  
> a female's first infant was what Jeanne and I just did for  
> assigning matured BY dates (at least in most cases - sometimes  
> different logic was used to determine the matured BY date, but all  
> that is written-up on a case by case basis in the Babase change log).
>
> If a female already had a matured date and that matured data did  
> not fall during a period of spotty monitoring (Jeanne gave me dates  
> for each study group to query), then I didn't question the matured  
> date or its status.
>
> Thanks for pointing out the need to clarify that - let me know if I  
> still didn't explain it well.
>
> Catherine
>
>
> Susan Alberts wrote:
>> Thanks Catherine. All of this was clear except one comment that  
>> I've asked about below.
>>> All other females were investigated on a case by case basis.  For  
>>> most, the earliest date indicating sexual maturity was 178 days  
>>> (average gestation) prior to the birth of their first documented  
>>> offspring.
>>>
>> Are you saying that you found females in the database that had  
>> maturity dates coresponding to 178 days before their first birth?  
>> Or are you saying that this was the method you used to assign "by"  
>> dates to females that were known to have matured but at an unknown  
>> date? In other words, are you saying that the rule for assigning a  
>> "by" date to a female was (1) if she was known to have at least  
>> one pregnancy and (2) we don't know her exact menarche date, then  
>> (3) she was given a by date coresponding to 178 days before the  
>> birth o9f the first known offspring?
>> Thanks,
>> Susan
>> -----------------------------------------------
>> Susan Alberts, Dept. Biology, Duke University, Durham NC 27708.  
>> Phone 919-660-7272, Fax 919-660-7293. alberts at duke.edu
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-----------------------------------------------
Susan Alberts, Dept. Biology, Duke University, Durham NC 27708. Phone  
919-660-7272, Fax 919-660-7293. alberts at duke.edu





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